Jürgen Dorn | Tu Wien (original) (raw)

Papers by Jürgen Dorn

The digitalization is changing the way businesses work and interact. Concepts like Internet of Th... more The digitalization is changing the way businesses work and interact. Concepts like Internet of Things, Cloud Computing, Industry 4.0, Smart Production, Smart Homes or Smart Cities are based on linking systems to an online network. The online data access provides potential to optimize processes and cost reductions, but also expose sensible data to a risk for inappropriate use. Fake news in social media is another example for problems with untrustable online data. Data security and trust in data is thus a major concern today. The speed in digitalization makes it even a greater challenge for future research. This paper therefore deals with a concept to evaluate the trust in data. Specifically, it is about the trust assessment in e-commerce data of businesses in the industry domain. Therefore, this article introduces interviews with buying experts and provides insights into the trust evaluation as integral part of the transaction process when conducting e-commerce. This research introdu...

Procedia CIRP, 2017

The production of labor cost intense goods in industrial countries becomes increasingly unprofita... more The production of labor cost intense goods in industrial countries becomes increasingly unprofitable, unless add-on values can be delivered by supporting services. Research in Industrial Product Service Systems (IPSS)-a marketable set of products and services-focuses on all aspects of IPSS and supports the conversion of industrial countries towards a service society. This fundamental change in paradigm sometimes described as the 'servizitation of manufacturing' could be seen as survival strategy against low labor costs within a global market. However, industrial procurement perceives IPSS as more difficult to assess than product offers. Buying departments are challenged to compare values of different IPSS on an international market. Information asymmetry between expert seller and consumer, hidden information or outcome uncertainties are some of the reasons, that buyers perceive risks at IPSS purchasing. The complexity of working systems that support nowadays purchasing environments increased. Until now, no standardized systems such as e-markets are suitable to support buyers to find and compare available IPSS. This paper describes design guidelines for a system that supports the search, discovery and comparison of IPSS.

IFIP Advances in Information and Communication Technology, 2012

Typically, services are co-created by service provider and customer. This paper describes an appr... more Typically, services are co-created by service provider and customer. This paper describes an approach to account the full costs of a service considering costs at the provider side as well as on the customer side resulting in a more accurate cost model. Depending on the level of integration of provider and customer, explicit modeling of uncertainty is used to reflect the uncertainty about customer's competences. This model may help to improve the efficiency of services and whole service systems. We evaluate the model in a scenario derived from an industrial application.

2013 46th Hawaii International Conference on System Sciences, 2013

Service systems consider the co-creation of values in a process between provider and consumer wit... more Service systems consider the co-creation of values in a process between provider and consumer with a win-win situation for both. Service-Dominant Logic demands a new view on economic activities where competences of provider and consumer are the most important resource for value creation. Given these assumptions, we investigate whether costs in a service system shall be accounted in a different way to reflect the change in view. If service provision is seen as a process, activity-based cost models seem to be appropriate. We argue that an extension is necessary, because a service is co-created by resources of service provider and consumer. Furthermore, activities performed by the consumer are not under control and therefore additional uncertainty has to be considered. Our research question is whether we are able to compute service costs with a higher degree of accuracy than with traditional cost models.

Procedia CIRP, 2016

Industrial procurement is exposed to an increased service-oriented supplier market. However, indu... more Industrial procurement is exposed to an increased service-oriented supplier market. However, industrial e-marketplaces for product-services that are accepted by buying experts are rare. Possible buyer benefits of e-markets such as access to a wider range of markets, accumulation of required information, and increase of market transparency cannot be utilized. Currently, product-services are at best traded within closed silos that offer mainly manual search and comparison capabilities through a web storefront. A lack of existing "generic" industry-sector-specific concepts for service description is a main problem that the potential of e-commerce is not utilized for product-services. This article analyzes the requirements for service representation at emarkets regarding the manufacturing domain. State-of-the-art concepts of business service description are considered at the beginning of this research. Because of the heterogeneity of product-services, a case study was conducted in order to identify relevant product-services in the manufacturing domain. In order to study a real case scenario, a "first-tier supplier" in the automotive industry was used in this research study. This company is specialized in systems engineering and systems serial assembly. Typical product-services of this company source are manufactured products needed for serial production, for example, casting, milling, turning, or injecting molding parts, alongside a wide range of services. Investigating the professional purchasing department was necessary to analyze the requirements in service description throughout the complete buying process, commencing with the conceptual product design stage until the serial product delivery.

Industrial procurement is exposed to an increased service-oriented supplier market. However, indu... more Industrial procurement is exposed to an increased service-oriented supplier market. However, industrial e-marketplaces for product-services that are accepted by buying experts are rare. Possible buyer benefits of e-markets such as access to a wider range of markets, accumulation of required information, and increase of market transparency cannot be utilized. Currently, product-services are at best traded within closed silos that offer mainly manual search and comparison capabilities through a web storefront. A lack of existing " generic " industry-sector-specific concepts for service description is a main problem that the potential of e-commerce is not utilized for product-services. This article analyzes the requirements for service representation at e-markets regarding the manufacturing domain. State-of-the-art concepts of business service description are considered at the beginning of this research. Because of the heterogeneity of product-services, a case study was conducted in order to identify relevant product-services in the manufacturing domain. In order to study a real case scenario, a " first-tier supplier " in the automotive industry was used in this research study. This company is specialized in systems engineering and systems serial assembly. Typical product-services of this company source are manufactured products needed for serial production, for example, casting, milling, turning, or injecting molding parts, alongside a wide range of services. Investigating the professional purchasing department was necessary to analyze the requirements in service description throughout the complete buying process, commencing with the conceptual product design stage until the serial product delivery.

Today, most knowledge-based companies organize work in projects. Due to different reasons knowled... more Today, most knowledge-based companies organize work in projects. Due to different reasons knowledge gained in projects is not documented and shared in an appropriate manner resulting in the problem that critical knowledge is lost. We propose case-based storage of relevant knowledge and an appropriate reasoning about this knowledge to support organizations in new projects. In order to achieve this objective, we have analyzed which kind of critical knowledge is gained in projects or other way round, which missing knowledge results in the failing of projects. A case is a pre-defined knowledge structure filled out by potentially different stakeholders of the project. After the first planning of a new project, if the project characteristics are entered, case-based reasoning is used to find similar old projects and derive from them additional attributes and to make potential risks visible. This is useful to better estimate the effort of a project, the required human competences and the required communication between stakeholders. This knowledge transfer can support also other phases of a project such as scheduling activities. In a closing phase, individual problems solved in the project can be documented as a kind of lessons-learned attempt.

In vielen wissenschaftlich-technischen Disziplinen ist die formale Ausbildung meist unzureichend ... more In vielen wissenschaftlich-technischen Disziplinen ist die formale Ausbildung meist unzureichend bzw. zeitlich beschränkt gültig, weil Technologien sich sehr schnell ändern und neues Wissen von Mitarbeitern laufend erweitert und adaptiert werden muss. Aber auch in mehr praktischen Domänen (z.B. Hausbau) ändern sich die benötigten Kompetenzen laufend. Lebenslanges Lernen ist deswegen ein Stichwort, das in der Europäischen Union wie auch in anderen hochentwickelten Regionen häufig gefordert wird. Informales Lernen, also ein Lernen ohne Curriculum und ohne ein formales Abschlusszertifikat, führt ein Schattendasein in unserer Gesellschaft, weil häufig die Anerkennung dieses Wissens-und Kompetenzerwerbs im Arbeitsumfeld fehlt. Aber auch in der Universität fehlt die Anerkennung, da nur jenes Wissen gefordert wird, das laut Curriculum vorgeschrieben ist. Wenn ein Student oder Studentin neben dem Studium arbeitet und dort fachliche und/oder soziale Kompetenzen erwirbt, fließt dies nicht in die Bewertung des Studienerfolgs ein. Die EU und andere Organisationen fordern heute eine stärkere Anerkennung von informalem Lernen (Björnavåld 2001).

IEEE Expert / IEEE Intelligent Systems, 1996

The paper describes a scheduling system for a high-grade steel making plant. Because very special... more The paper describes a scheduling system for a high-grade steel making plant. Because very specialized steel grades are produced the variety of the chemical analysis of the heats is very high and the lot sizes are small. One of the most constraining factors in the production is the infiltration of chemical elements between consecutive heats in the electric arc furnace. To find a schedule that violates no compatibility constraints is theoretically in the worst case an NP-hard problem.

and Technology Conference 2008, Jan 1, 2008

Welcome to the International Computer Science and Technology Conference 2008 (ICSTC). This confer... more Welcome to the International Computer Science and Technology Conference 2008 (ICSTC). This conference is intended to bring together researchers and practitioners from industry, academia and government to advance the state of the art in computer science, software engineering and technology and to encourage wider collaboration between academics and industry. The Conference is held for the computing community and hosted by National University.

Proceedings of the ECAI, Jan 1, 1994

In this paper we describe an approach to solve a scheduling problem in the steel making industry ... more In this paper we describe an approach to solve a scheduling problem in the steel making industry with a combination of a constraint repair approach and genetic algorithms. Because several, sometimes conflicting objectives exist in the production of steel, we have proposed a representation of constraint violations and their importance by fuzzy sets (Dorn and Slany 1994). A weighted aggregation of the violations gives us a means to compare schedules. Furthermore, as pointed out by the strategy to repair constraints in order to achieve better schedules is a good heuristic for large applications. We have therefore developed domain independent genetic operators that apply knowledge of constraint violations. We report on experiments that show the improvement of the combination for our application and draw some conclusions. * This paper was published in the Proceedings of the ECAI'94 Workshop on Genetic Algorithms and other Evolutionary Algorithms, Amsterdam and is considered for publication in LNCS.

XPS-99: Knowledge-Based Systems. Survey and …, Jan 1, 1999

Production scheduling plays a key enabling technique in improving the efficiency of modern produc... more Production scheduling plays a key enabling technique in improving the efficiency of modern production enterprises facing the international competition. Although the trend of software development for business application demands standard software, there exist no standard scheduling software package that can be applied to these applications. In this paper a special architecture based on object-oriented application frameworks and AI-reasoning methods is proposed as a mean to narrow this gap.

International Journal of Human and Social Sciences, Jan 1, 2006

In the area of Human Resource Management, the trend is towards online exchange of information abo... more In the area of Human Resource Management, the trend is towards online exchange of information about human resources. For example, online applications for employment become standard and job offerings are posted in many job portals. However, there are too many job portals to monitor all of them if someone is interested in a new job. We developed a prototype for integrating information of different job portals into one meta-search engine. First, existing job portals were investigated and XML schema documents were derived automated from these portals. Second, translation rules for transforming each schema to a central HR-XMLconform schema were determined. The HR-XML-schema is used to build a form for searching jobs. The data supplied by a user in this form is now translated into queries for the different job portals. Each result obtained by a job portal is sent to the meta-search engine that ranks the result of all received job offers according to user's preferences.

… and e-Service, 2005. EEE'05. …, Jan 1, 2005

This paper describes how a software solution of the EEE-05 challenge can be integrated in the MOV... more This paper describes how a software solution of the EEE-05 challenge can be integrated in the MOVE framework. It introduces the MOVE framework and relates the EEE-05 challenge solution and the MOVE framework. The solution's software components and architecture is introduced as well as the used algorithms. In addition, a suggestion for a reasonable further component that uses the EEE-05 challenge solutions is given.

Agent and web service …, Jan 1, 2008

One main characteristic of virtual enterprises are short-term collaborations between business par... more One main characteristic of virtual enterprises are short-term collaborations between business partners to provide efficient and individualized services to customers. The MOVE project targets at a methodology and a software framework to support such flexible collaborations based on process oriented design and communication by Web services. MOVE's framework supports the graphical design and verification of business processes, the execution and supervision of processes in transaction-oriented environment, and the dynamic composition and optimization of processes. A business process may be composed from a set of Web services, deployed itself as Web service and executed in the framework. The composition of processes from Web services is implemented with methods from AI-planning. We apply Answer Set Programming (ASP) and map Web service descriptions and customer requests into the input language of the ASP software DLV. Composition goals and constraints guide a composition challenge. We show the performance of our program and give some implementation details. Finally we conclude with some insights.

ECAI, Jan 1, 1994

In this paper a framework for the combination of qualitative and metric temporal knowledge is pre... more In this paper a framework for the combination of qualitative and metric temporal knowledge is presented. It is intended especially for technical applications with real-time requirements and was applied to several scheduling problems. For realistic applications in such domains one has to consider uncertainty and vagueness of temporal knowledge.

Scheduling of production processes, Jan 1, 1993

... Pages: 163 - 178. Year of Publication: 1993. ISBN:0-13-075136-7. Author, Jürgen Dorn, Publish... more ... Pages: 163 - 178. Year of Publication: 1993. ISBN:0-13-075136-7. Author, Jürgen Dorn, Publisher, Ellis Horwood Upper Saddle River, NJ, USA. ... Collaborative Colleagues: Jürgen Dorn: colleagues. The ACM Portal is published by the Association for Computing Machinery. ...

Proceedings of European Conference on …, Jan 1, 2007

We present an information system for storing, evaluating and reasoning about competencies of stud... more We present an information system for storing, evaluating and reasoning about competencies of students at universities. The system is based on a fine-grained representation of skills and a competence ontology. The system supports students in planning their courses by performing a gap analysis and by producing competency profiles for job applications. The representation of profiles is based on HR-XML in order to enable an exchange of data. Referenced competencies are defined in an ontology and the presence or strength of a competency can be testified by evidences. One possible evidence described in the paper is an explicit measurement. If owners (the students) enable the access to a profile, recruitment and other companies may use these profiles to find appropriate candidates for job vacancies. Due to the sensibility of stored data we use an encrypted XML data store.

Information Systems and e- …, Jan 1, 2009

In recent years business-to-business (B2B) e-commerce has been subject to major rethinking. A par... more In recent years business-to-business (B2B) e-commerce has been subject to major rethinking. A paradigm shift from document centric filebased interchange of business information to process-centric and finally, a service-based information exchange can be observed. On a business level, a lot of work has been done to capture business models and collaborative business processes of an enterprise; further initiatives address the identification of customer services and the formalization of business service level agreements. On a technical level, the focus in software development is moving towards service-oriented architectures (SOA). These developments on both levels promise more flexibility, a market entry at lower costs and an easier IT-alignment to changing market conditions. Hence, an overwhelming quantity of specifications and approaches emerged in the past targeting the area of B2B -these approaches are partly competing and overlapping. In this paper, we provide a survey of the most promising ones at both levels and classify them using the Open-edi reference model standardized by ISO. Furthermore, we discuss how individual specifications on different levels may fit together -starting from business models via business processes to artifacts ready for deployment. Whereas on the technical level, service-oriented architecture is becoming the predominant approach, on the business level the landscape is more heterogenuous. In this context, we propose to integrate business modeling with process modeling in order to make the transformation from business services to Web services more transparent.

The digitalization is changing the way businesses work and interact. Concepts like Internet of Th... more The digitalization is changing the way businesses work and interact. Concepts like Internet of Things, Cloud Computing, Industry 4.0, Smart Production, Smart Homes or Smart Cities are based on linking systems to an online network. The online data access provides potential to optimize processes and cost reductions, but also expose sensible data to a risk for inappropriate use. Fake news in social media is another example for problems with untrustable online data. Data security and trust in data is thus a major concern today. The speed in digitalization makes it even a greater challenge for future research. This paper therefore deals with a concept to evaluate the trust in data. Specifically, it is about the trust assessment in e-commerce data of businesses in the industry domain. Therefore, this article introduces interviews with buying experts and provides insights into the trust evaluation as integral part of the transaction process when conducting e-commerce. This research introdu...

Procedia CIRP, 2017

The production of labor cost intense goods in industrial countries becomes increasingly unprofita... more The production of labor cost intense goods in industrial countries becomes increasingly unprofitable, unless add-on values can be delivered by supporting services. Research in Industrial Product Service Systems (IPSS)-a marketable set of products and services-focuses on all aspects of IPSS and supports the conversion of industrial countries towards a service society. This fundamental change in paradigm sometimes described as the 'servizitation of manufacturing' could be seen as survival strategy against low labor costs within a global market. However, industrial procurement perceives IPSS as more difficult to assess than product offers. Buying departments are challenged to compare values of different IPSS on an international market. Information asymmetry between expert seller and consumer, hidden information or outcome uncertainties are some of the reasons, that buyers perceive risks at IPSS purchasing. The complexity of working systems that support nowadays purchasing environments increased. Until now, no standardized systems such as e-markets are suitable to support buyers to find and compare available IPSS. This paper describes design guidelines for a system that supports the search, discovery and comparison of IPSS.

IFIP Advances in Information and Communication Technology, 2012

Typically, services are co-created by service provider and customer. This paper describes an appr... more Typically, services are co-created by service provider and customer. This paper describes an approach to account the full costs of a service considering costs at the provider side as well as on the customer side resulting in a more accurate cost model. Depending on the level of integration of provider and customer, explicit modeling of uncertainty is used to reflect the uncertainty about customer's competences. This model may help to improve the efficiency of services and whole service systems. We evaluate the model in a scenario derived from an industrial application.

2013 46th Hawaii International Conference on System Sciences, 2013

Service systems consider the co-creation of values in a process between provider and consumer wit... more Service systems consider the co-creation of values in a process between provider and consumer with a win-win situation for both. Service-Dominant Logic demands a new view on economic activities where competences of provider and consumer are the most important resource for value creation. Given these assumptions, we investigate whether costs in a service system shall be accounted in a different way to reflect the change in view. If service provision is seen as a process, activity-based cost models seem to be appropriate. We argue that an extension is necessary, because a service is co-created by resources of service provider and consumer. Furthermore, activities performed by the consumer are not under control and therefore additional uncertainty has to be considered. Our research question is whether we are able to compute service costs with a higher degree of accuracy than with traditional cost models.

Procedia CIRP, 2016

Industrial procurement is exposed to an increased service-oriented supplier market. However, indu... more Industrial procurement is exposed to an increased service-oriented supplier market. However, industrial e-marketplaces for product-services that are accepted by buying experts are rare. Possible buyer benefits of e-markets such as access to a wider range of markets, accumulation of required information, and increase of market transparency cannot be utilized. Currently, product-services are at best traded within closed silos that offer mainly manual search and comparison capabilities through a web storefront. A lack of existing "generic" industry-sector-specific concepts for service description is a main problem that the potential of e-commerce is not utilized for product-services. This article analyzes the requirements for service representation at emarkets regarding the manufacturing domain. State-of-the-art concepts of business service description are considered at the beginning of this research. Because of the heterogeneity of product-services, a case study was conducted in order to identify relevant product-services in the manufacturing domain. In order to study a real case scenario, a "first-tier supplier" in the automotive industry was used in this research study. This company is specialized in systems engineering and systems serial assembly. Typical product-services of this company source are manufactured products needed for serial production, for example, casting, milling, turning, or injecting molding parts, alongside a wide range of services. Investigating the professional purchasing department was necessary to analyze the requirements in service description throughout the complete buying process, commencing with the conceptual product design stage until the serial product delivery.

Industrial procurement is exposed to an increased service-oriented supplier market. However, indu... more Industrial procurement is exposed to an increased service-oriented supplier market. However, industrial e-marketplaces for product-services that are accepted by buying experts are rare. Possible buyer benefits of e-markets such as access to a wider range of markets, accumulation of required information, and increase of market transparency cannot be utilized. Currently, product-services are at best traded within closed silos that offer mainly manual search and comparison capabilities through a web storefront. A lack of existing " generic " industry-sector-specific concepts for service description is a main problem that the potential of e-commerce is not utilized for product-services. This article analyzes the requirements for service representation at e-markets regarding the manufacturing domain. State-of-the-art concepts of business service description are considered at the beginning of this research. Because of the heterogeneity of product-services, a case study was conducted in order to identify relevant product-services in the manufacturing domain. In order to study a real case scenario, a " first-tier supplier " in the automotive industry was used in this research study. This company is specialized in systems engineering and systems serial assembly. Typical product-services of this company source are manufactured products needed for serial production, for example, casting, milling, turning, or injecting molding parts, alongside a wide range of services. Investigating the professional purchasing department was necessary to analyze the requirements in service description throughout the complete buying process, commencing with the conceptual product design stage until the serial product delivery.

Today, most knowledge-based companies organize work in projects. Due to different reasons knowled... more Today, most knowledge-based companies organize work in projects. Due to different reasons knowledge gained in projects is not documented and shared in an appropriate manner resulting in the problem that critical knowledge is lost. We propose case-based storage of relevant knowledge and an appropriate reasoning about this knowledge to support organizations in new projects. In order to achieve this objective, we have analyzed which kind of critical knowledge is gained in projects or other way round, which missing knowledge results in the failing of projects. A case is a pre-defined knowledge structure filled out by potentially different stakeholders of the project. After the first planning of a new project, if the project characteristics are entered, case-based reasoning is used to find similar old projects and derive from them additional attributes and to make potential risks visible. This is useful to better estimate the effort of a project, the required human competences and the required communication between stakeholders. This knowledge transfer can support also other phases of a project such as scheduling activities. In a closing phase, individual problems solved in the project can be documented as a kind of lessons-learned attempt.

In vielen wissenschaftlich-technischen Disziplinen ist die formale Ausbildung meist unzureichend ... more In vielen wissenschaftlich-technischen Disziplinen ist die formale Ausbildung meist unzureichend bzw. zeitlich beschränkt gültig, weil Technologien sich sehr schnell ändern und neues Wissen von Mitarbeitern laufend erweitert und adaptiert werden muss. Aber auch in mehr praktischen Domänen (z.B. Hausbau) ändern sich die benötigten Kompetenzen laufend. Lebenslanges Lernen ist deswegen ein Stichwort, das in der Europäischen Union wie auch in anderen hochentwickelten Regionen häufig gefordert wird. Informales Lernen, also ein Lernen ohne Curriculum und ohne ein formales Abschlusszertifikat, führt ein Schattendasein in unserer Gesellschaft, weil häufig die Anerkennung dieses Wissens-und Kompetenzerwerbs im Arbeitsumfeld fehlt. Aber auch in der Universität fehlt die Anerkennung, da nur jenes Wissen gefordert wird, das laut Curriculum vorgeschrieben ist. Wenn ein Student oder Studentin neben dem Studium arbeitet und dort fachliche und/oder soziale Kompetenzen erwirbt, fließt dies nicht in die Bewertung des Studienerfolgs ein. Die EU und andere Organisationen fordern heute eine stärkere Anerkennung von informalem Lernen (Björnavåld 2001).

IEEE Expert / IEEE Intelligent Systems, 1996

The paper describes a scheduling system for a high-grade steel making plant. Because very special... more The paper describes a scheduling system for a high-grade steel making plant. Because very specialized steel grades are produced the variety of the chemical analysis of the heats is very high and the lot sizes are small. One of the most constraining factors in the production is the infiltration of chemical elements between consecutive heats in the electric arc furnace. To find a schedule that violates no compatibility constraints is theoretically in the worst case an NP-hard problem.

and Technology Conference 2008, Jan 1, 2008

Welcome to the International Computer Science and Technology Conference 2008 (ICSTC). This confer... more Welcome to the International Computer Science and Technology Conference 2008 (ICSTC). This conference is intended to bring together researchers and practitioners from industry, academia and government to advance the state of the art in computer science, software engineering and technology and to encourage wider collaboration between academics and industry. The Conference is held for the computing community and hosted by National University.

Proceedings of the ECAI, Jan 1, 1994

In this paper we describe an approach to solve a scheduling problem in the steel making industry ... more In this paper we describe an approach to solve a scheduling problem in the steel making industry with a combination of a constraint repair approach and genetic algorithms. Because several, sometimes conflicting objectives exist in the production of steel, we have proposed a representation of constraint violations and their importance by fuzzy sets (Dorn and Slany 1994). A weighted aggregation of the violations gives us a means to compare schedules. Furthermore, as pointed out by the strategy to repair constraints in order to achieve better schedules is a good heuristic for large applications. We have therefore developed domain independent genetic operators that apply knowledge of constraint violations. We report on experiments that show the improvement of the combination for our application and draw some conclusions. * This paper was published in the Proceedings of the ECAI'94 Workshop on Genetic Algorithms and other Evolutionary Algorithms, Amsterdam and is considered for publication in LNCS.

XPS-99: Knowledge-Based Systems. Survey and …, Jan 1, 1999

Production scheduling plays a key enabling technique in improving the efficiency of modern produc... more Production scheduling plays a key enabling technique in improving the efficiency of modern production enterprises facing the international competition. Although the trend of software development for business application demands standard software, there exist no standard scheduling software package that can be applied to these applications. In this paper a special architecture based on object-oriented application frameworks and AI-reasoning methods is proposed as a mean to narrow this gap.

International Journal of Human and Social Sciences, Jan 1, 2006

In the area of Human Resource Management, the trend is towards online exchange of information abo... more In the area of Human Resource Management, the trend is towards online exchange of information about human resources. For example, online applications for employment become standard and job offerings are posted in many job portals. However, there are too many job portals to monitor all of them if someone is interested in a new job. We developed a prototype for integrating information of different job portals into one meta-search engine. First, existing job portals were investigated and XML schema documents were derived automated from these portals. Second, translation rules for transforming each schema to a central HR-XMLconform schema were determined. The HR-XML-schema is used to build a form for searching jobs. The data supplied by a user in this form is now translated into queries for the different job portals. Each result obtained by a job portal is sent to the meta-search engine that ranks the result of all received job offers according to user's preferences.

… and e-Service, 2005. EEE'05. …, Jan 1, 2005

This paper describes how a software solution of the EEE-05 challenge can be integrated in the MOV... more This paper describes how a software solution of the EEE-05 challenge can be integrated in the MOVE framework. It introduces the MOVE framework and relates the EEE-05 challenge solution and the MOVE framework. The solution's software components and architecture is introduced as well as the used algorithms. In addition, a suggestion for a reasonable further component that uses the EEE-05 challenge solutions is given.

Agent and web service …, Jan 1, 2008

One main characteristic of virtual enterprises are short-term collaborations between business par... more One main characteristic of virtual enterprises are short-term collaborations between business partners to provide efficient and individualized services to customers. The MOVE project targets at a methodology and a software framework to support such flexible collaborations based on process oriented design and communication by Web services. MOVE's framework supports the graphical design and verification of business processes, the execution and supervision of processes in transaction-oriented environment, and the dynamic composition and optimization of processes. A business process may be composed from a set of Web services, deployed itself as Web service and executed in the framework. The composition of processes from Web services is implemented with methods from AI-planning. We apply Answer Set Programming (ASP) and map Web service descriptions and customer requests into the input language of the ASP software DLV. Composition goals and constraints guide a composition challenge. We show the performance of our program and give some implementation details. Finally we conclude with some insights.

ECAI, Jan 1, 1994

In this paper a framework for the combination of qualitative and metric temporal knowledge is pre... more In this paper a framework for the combination of qualitative and metric temporal knowledge is presented. It is intended especially for technical applications with real-time requirements and was applied to several scheduling problems. For realistic applications in such domains one has to consider uncertainty and vagueness of temporal knowledge.

Scheduling of production processes, Jan 1, 1993

... Pages: 163 - 178. Year of Publication: 1993. ISBN:0-13-075136-7. Author, Jürgen Dorn, Publish... more ... Pages: 163 - 178. Year of Publication: 1993. ISBN:0-13-075136-7. Author, Jürgen Dorn, Publisher, Ellis Horwood Upper Saddle River, NJ, USA. ... Collaborative Colleagues: Jürgen Dorn: colleagues. The ACM Portal is published by the Association for Computing Machinery. ...

Proceedings of European Conference on …, Jan 1, 2007

We present an information system for storing, evaluating and reasoning about competencies of stud... more We present an information system for storing, evaluating and reasoning about competencies of students at universities. The system is based on a fine-grained representation of skills and a competence ontology. The system supports students in planning their courses by performing a gap analysis and by producing competency profiles for job applications. The representation of profiles is based on HR-XML in order to enable an exchange of data. Referenced competencies are defined in an ontology and the presence or strength of a competency can be testified by evidences. One possible evidence described in the paper is an explicit measurement. If owners (the students) enable the access to a profile, recruitment and other companies may use these profiles to find appropriate candidates for job vacancies. Due to the sensibility of stored data we use an encrypted XML data store.

Information Systems and e- …, Jan 1, 2009

In recent years business-to-business (B2B) e-commerce has been subject to major rethinking. A par... more In recent years business-to-business (B2B) e-commerce has been subject to major rethinking. A paradigm shift from document centric filebased interchange of business information to process-centric and finally, a service-based information exchange can be observed. On a business level, a lot of work has been done to capture business models and collaborative business processes of an enterprise; further initiatives address the identification of customer services and the formalization of business service level agreements. On a technical level, the focus in software development is moving towards service-oriented architectures (SOA). These developments on both levels promise more flexibility, a market entry at lower costs and an easier IT-alignment to changing market conditions. Hence, an overwhelming quantity of specifications and approaches emerged in the past targeting the area of B2B -these approaches are partly competing and overlapping. In this paper, we provide a survey of the most promising ones at both levels and classify them using the Open-edi reference model standardized by ISO. Furthermore, we discuss how individual specifications on different levels may fit together -starting from business models via business processes to artifacts ready for deployment. Whereas on the technical level, service-oriented architecture is becoming the predominant approach, on the business level the landscape is more heterogenuous. In this context, we propose to integrate business modeling with process modeling in order to make the transformation from business services to Web services more transparent.