Hans Veeke - Academia.edu (original) (raw)

Papers by Hans Veeke

Research paper thumbnail of Uitbesteding van laboratoriumdiagnostiek - een analyse van de logistiek met behulp van de Delft Systems Approach

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Research paper thumbnail of The Delft Systems Approach: Analysis and Design of Industrial Systems

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Research paper thumbnail of Model Design for Agent-based Simulation

Proceedings of the 8th International Conference on Computer Modeling and Simulation

This paper describes the complete modelling process for simulation, starting with the identificat... more This paper describes the complete modelling process for simulation, starting with the identification of agents and ending with a clear and unambiguous description of their behaviour that can be easily translated into each process-oriented simulation platform. It focuses on the definition of agents, a subject which is described rarely. Agents usually "are there", emerging from the things one can see. Defining agents however, determines completely the range and content of a simulation and is not a trivial case. After a deliberate definition of the agents, a natural way to describe their behaviour is presented. These behaviour descriptions match the real process interaction approach. The described method is developed for educational reasons in order to teach discrete event simulation in a non-mathematical way, but is rather complete, coherent and well-defined.

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Research paper thumbnail of Agvs in a production environment-a flexible and modular transport system for production

Modelling and simulation 2010-the european simulation and modelling conference 2010-esm2010, hasselt, belgie, 2010

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Research paper thumbnail of Prototyping of production- and transportation systems

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Research paper thumbnail of Prognostics inthecontrol of logistics systems A.M.LopezDeLaCruz,H.P.M.Veeke, andG.Lodewijks

Theuseoftechnological tools inlogistics hasthe intention ofincreasing visibility, capacity andcon... more Theuseoftechnological tools inlogistics hasthe intention ofincreasing visibility, capacity andcontrol inthe supply chain. Decrease ofuncertainties duetoasymmetric data hasbeentheconstant challenge ofmanagement. Misdiagnosis ofsituations andequipment, inaccurate production planning, shrinkage andcounterfeiting aresomeofthecommonproblems asaconsequence oferroneous information. Theideaofprognostic logistics istouserealtimeinformation andanintelligent system todiagnose andpredict early failures andhazardous situations. Theautomatic capture ofinformation inprognostic logistics hastheintent toreduce humanerrors. Automatic identification technologies enable thecreation ofaprognostic logistic network wherereal timeinformation isusedtomakeaccurate forecasting, pushing aproactive supply chaininstead ofareactive one. IndexTerms-Prognostics, logistics, automatic identification, RFID.

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Research paper thumbnail of A Virtual Design Environment for the Port of the Future

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Research paper thumbnail of Interdisciplinary Modeling For Logistics Design

In this paper a conceptual model is defined that can be used for the innovative design of logisti... more In this paper a conceptual model is defined that can be used for the innovative design of logistic systems. The model is constructed by using the systems approach in a formal and fundamental way. It turns out that the model complies with the `hard systems approach', positioned in a trajectory according the `soft systems approach'. By this the model is an interdisciplinary tool that serves as a common frame of reference and decision making platform for the different disciplines involved. It enables unambiguous communication. Conceptual modeling of each separate discipline including their different monodisciplinary goals, is reflected by this single model. The model also serves as a facility to save design conditions and decisions for future innovations. The model forms the basis to build "shared memory".

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Research paper thumbnail of Experimenting With Distributed Modeling And Simulation Using The Internet

Traditionally, most applied discrete simulation models are still stand-alone models running on a ... more Traditionally, most applied discrete simulation models are still stand-alone models running on a single computer and using a single sequencing mechanism. In this paper we focus on distributed modeling and the consequences of its use on the time sequencing and interactions between distributed models. As an example a stand-alone model and two different distributed models of a simple shipping system are designed. The important steps and some remaining questions are discussed. This modeling effort was part of the development and verification of the simulation package TOMAS, which fully supports distributed modeling and simulation. The process-oriented modeling approach provided the basis for this. The TOMAS package has been made available on the Internet.

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Research paper thumbnail of Model Integrity and Distributed Process Interaction Simulation

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Research paper thumbnail of A Generic Simulation Model For Systems Of Container Terminals

This paper presents the design of a simulation model that is being used in a research project to ... more This paper presents the design of a simulation model that is being used in a research project to investigate terminal structures for container handling on the planned extension of the Rotterdan port area "Maasvlakte 2". The research project will use simulation for decision support from the very start of the research until the detailed operational and control studies in future. The model described in this paper is the first simulation model developed for global studies, but it will also be used in future detailed studies. The requirements for modeling, the first results and the future use of the model are highlighted.

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Research paper thumbnail of A Simulation Architecture for Complex Design Projects

This paper presents the functional design of a simulation architecture supporting simulation rese... more This paper presents the functional design of a simulation architecture supporting simulation research from the very start to the very end of a complex design project. The architecture is currently being used in the FAMAS.MV2 research program to investigate terminal structures for container handling on the planned extension of the Rotterdam port area "Maasvlakte 2". The simulation architecture creates a harmonized simulation environment (a "backbone") that links and synchronizes the different simulation models during the different project stages into one experimentation and demonstration environment. The result is an architecture supporting multiple simulation platforms in an almost completely transparent way for the users. The design has been successfully implemented and the first simulation experiments have already been performed with it.

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Research paper thumbnail of Applied Distributed Discrete Process Simulation

With the growing scale and complexity of simulation projects, stand-alone simulation models are b... more With the growing scale and complexity of simulation projects, stand-alone simulation models are becoming too limited to support the design phase in a sufficiently valid way. Besides that there is a trend to combine separately developed models and extend the use of modeled software to prototyping or even real environments. This paper describes an open, easy and general concept for distributed modeling and simulation. The concept is suitable for research, educational and commercial design environments. The concept does not require special hardware or study and is, for the sequencing part, completely transparent to the simulationist. It is implemented in the free and open source simulation tool 'TOMAS', which is based on the process approach for discrete event simulation. To show a concrete example, the concept is applied to a dimensioning problem for AGV systems.

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Research paper thumbnail of Simulation Studies of Robotized Multi Terminal Systems

Contents............................................................................................ more Contents........................................................................................................................3

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Research paper thumbnail of PROJECT MANAGEMENT WITH SIMULATION A critical view on the critical path

A process-oriented simulation approach to project management is proposed which gives realistic st... more A process-oriented simulation approach to project management is proposed which gives realistic statistical information about total project data and about individual activities as a function of contractual completion-time. The proposed method provides the possibility to define a generic activity network, which is simulated. The activities in the network may have any statistical or tabulated completion-time distribution. A project simulation run consists of a large number of sub-runs each simulating a project realisation. A run provides statistical information with respect to project completion-times, individual activities such as the probability of activities being critical and excess probability of contract time, and information for monitoring contract critical activities during project realisation. A case of aircraft maintenance is elaborated in which the model is used to reduce the number of contract time excesses using a simple rule assigning extra capacity to activities. The rul...

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Research paper thumbnail of Simulation of a New Port-Ship Interface Concept for Inter Modal Transport

This study is part of the project Improved Port/Ship interface (IPSI) , supported by the EU Commi... more This study is part of the project Improved Port/Ship interface (IPSI) , supported by the EU Commission. The general objective of the project is to strengthen the economic position of waterborne transport, especially short sea shipping. In the IPSI-concept, the terminal is the central point of inter modal logistic chains. This paper concerns a simulation study, with the overall objective to prove that the IPSI-terminal concept can work under realistic conditions. The innovative terminal concept allows horizontal loading and unloading of seagoing ships by Automatic Guided Vehicles [AGVs] , and is designed for fast throughput and short in-port times. The simulation shows that maximum capacity of the IPSI-terminal is 1.75 million twenty feet container equivalents (TEU) per year. Guidelines are derived for terminal design taking into consideration the terminal dimensions, cargo flow characteristics, equipment characteristics and desired service levels for all modes of transport

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Research paper thumbnail of Problem Oriented Modelling and Simulation

This paper proposes to combine the ‘systems approach’ technique with process-oriented modelling a... more This paper proposes to combine the ‘systems approach’ technique with process-oriented modelling and simulation. The process-oriented modelling concept, in which a system is decomposed into a set of component classes, each with a specific data structure, processes and mutual interactions fits well to the general concept of ‘systems approach’. The advantages of this are that during the design phase the modelling can be ‘problem oriented’ and furthermore a hierarchical structure can be designed. Combining this approach with a modern software platform provides opportunities for flexible modelling an reuse of component classes. As an example the modelling of part of a container terminal is shown. An absolute demand on a simulation tool for practice is its speed and the capability to manage large-scale models. A simple benchmark has been worked out in a process-oriented package ‘TOMAS’, the kernel of which is a fast sequencing mechanism for managing parallel processes.

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Research paper thumbnail of Transparent Distributed Discrete Event Modeling

Stand-alone modeling and distributed modeling show considerable differences in methodology and am... more Stand-alone modeling and distributed modeling show considerable differences in methodology and amount of modeling effort needed. An approach is discussed to design and develop distributed models with the ease of stand-alone modeling and without the overhead usually associated with distributed modeling. The main objective is to obtain interchangeability of a stand-alone model and its distributed equivalent, maintaining the model structure in all models and to minimize code alteration and overhead. Important requirements are reproducibility of simulation experiments and model integrity. The process interaction modeling approach appears to be very appropriate for this. Most attention is paid to the interaction between model elements in stand-alone as well as distributed models. Some examples are show in pseudo language and demands on simulation software are derived.

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Research paper thumbnail of Applied Distributed Discrete Process Simulation

With the growing scale and complexity of simulation projects, stand-alone simulation models are b... more With the growing scale and complexity of simulation projects, stand-alone simulation models are becoming too limited to support the design phase in a sufficiently valid way. Besides that there is a trend to combine separately developed models and extend the use of modeled software to prototyping or even real environments. This paper describes an open, easy and general concept for distributed modeling and simulation. The concept is suitable for research, educational and commercial design environments. The concept does not require special hardware or study and is, for the sequencing part, completely transparent to the simulationist. It is implemented in the free and open source simulation tool 'TOMAS', which is based on the process approach for discrete event simulation. To show a concrete example, the concept is applied to a dimensioning problem for AGV systems.

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Research paper thumbnail of Production Scheduling of Complex Jobs with Simulation

A simulation approach is presented for planning and scheduling a flow of complex jobs for job sho... more A simulation approach is presented for planning and scheduling a flow of complex jobs for job shop like production systems. Machines may have their own specific restrictions and properties such as relative production speed, set up characteristics and scheduling rules. A production job consists of a set of tasks represented by a directed activity network in which an activity is defined as a single task to be processed on a machine. As a consequence a machine may also be an assembly station. The task duration may be stochastic having any probability distribution. The task flow and the task selection for scheduling is governed by agents: Each machine group acts as an agent combining tasks and machines. Each task acts as an agent guarding the proper network sequences of its job by determining when it is ready for releasing and, after that, controlling its own scheduling priority. A job acts as an agent repeatedly updating critical path analysis for its tasks. For that purpose a separate...

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Research paper thumbnail of Uitbesteding van laboratoriumdiagnostiek - een analyse van de logistiek met behulp van de Delft Systems Approach

Bookmarks Related papers MentionsView impact

Research paper thumbnail of The Delft Systems Approach: Analysis and Design of Industrial Systems

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Model Design for Agent-based Simulation

Proceedings of the 8th International Conference on Computer Modeling and Simulation

This paper describes the complete modelling process for simulation, starting with the identificat... more This paper describes the complete modelling process for simulation, starting with the identification of agents and ending with a clear and unambiguous description of their behaviour that can be easily translated into each process-oriented simulation platform. It focuses on the definition of agents, a subject which is described rarely. Agents usually "are there", emerging from the things one can see. Defining agents however, determines completely the range and content of a simulation and is not a trivial case. After a deliberate definition of the agents, a natural way to describe their behaviour is presented. These behaviour descriptions match the real process interaction approach. The described method is developed for educational reasons in order to teach discrete event simulation in a non-mathematical way, but is rather complete, coherent and well-defined.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Agvs in a production environment-a flexible and modular transport system for production

Modelling and simulation 2010-the european simulation and modelling conference 2010-esm2010, hasselt, belgie, 2010

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Prototyping of production- and transportation systems

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Prognostics inthecontrol of logistics systems A.M.LopezDeLaCruz,H.P.M.Veeke, andG.Lodewijks

Theuseoftechnological tools inlogistics hasthe intention ofincreasing visibility, capacity andcon... more Theuseoftechnological tools inlogistics hasthe intention ofincreasing visibility, capacity andcontrol inthe supply chain. Decrease ofuncertainties duetoasymmetric data hasbeentheconstant challenge ofmanagement. Misdiagnosis ofsituations andequipment, inaccurate production planning, shrinkage andcounterfeiting aresomeofthecommonproblems asaconsequence oferroneous information. Theideaofprognostic logistics istouserealtimeinformation andanintelligent system todiagnose andpredict early failures andhazardous situations. Theautomatic capture ofinformation inprognostic logistics hastheintent toreduce humanerrors. Automatic identification technologies enable thecreation ofaprognostic logistic network wherereal timeinformation isusedtomakeaccurate forecasting, pushing aproactive supply chaininstead ofareactive one. IndexTerms-Prognostics, logistics, automatic identification, RFID.

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Research paper thumbnail of A Virtual Design Environment for the Port of the Future

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Research paper thumbnail of Interdisciplinary Modeling For Logistics Design

In this paper a conceptual model is defined that can be used for the innovative design of logisti... more In this paper a conceptual model is defined that can be used for the innovative design of logistic systems. The model is constructed by using the systems approach in a formal and fundamental way. It turns out that the model complies with the `hard systems approach', positioned in a trajectory according the `soft systems approach'. By this the model is an interdisciplinary tool that serves as a common frame of reference and decision making platform for the different disciplines involved. It enables unambiguous communication. Conceptual modeling of each separate discipline including their different monodisciplinary goals, is reflected by this single model. The model also serves as a facility to save design conditions and decisions for future innovations. The model forms the basis to build "shared memory".

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Experimenting With Distributed Modeling And Simulation Using The Internet

Traditionally, most applied discrete simulation models are still stand-alone models running on a ... more Traditionally, most applied discrete simulation models are still stand-alone models running on a single computer and using a single sequencing mechanism. In this paper we focus on distributed modeling and the consequences of its use on the time sequencing and interactions between distributed models. As an example a stand-alone model and two different distributed models of a simple shipping system are designed. The important steps and some remaining questions are discussed. This modeling effort was part of the development and verification of the simulation package TOMAS, which fully supports distributed modeling and simulation. The process-oriented modeling approach provided the basis for this. The TOMAS package has been made available on the Internet.

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Research paper thumbnail of Model Integrity and Distributed Process Interaction Simulation

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Research paper thumbnail of A Generic Simulation Model For Systems Of Container Terminals

This paper presents the design of a simulation model that is being used in a research project to ... more This paper presents the design of a simulation model that is being used in a research project to investigate terminal structures for container handling on the planned extension of the Rotterdan port area "Maasvlakte 2". The research project will use simulation for decision support from the very start of the research until the detailed operational and control studies in future. The model described in this paper is the first simulation model developed for global studies, but it will also be used in future detailed studies. The requirements for modeling, the first results and the future use of the model are highlighted.

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Research paper thumbnail of A Simulation Architecture for Complex Design Projects

This paper presents the functional design of a simulation architecture supporting simulation rese... more This paper presents the functional design of a simulation architecture supporting simulation research from the very start to the very end of a complex design project. The architecture is currently being used in the FAMAS.MV2 research program to investigate terminal structures for container handling on the planned extension of the Rotterdam port area "Maasvlakte 2". The simulation architecture creates a harmonized simulation environment (a "backbone") that links and synchronizes the different simulation models during the different project stages into one experimentation and demonstration environment. The result is an architecture supporting multiple simulation platforms in an almost completely transparent way for the users. The design has been successfully implemented and the first simulation experiments have already been performed with it.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Applied Distributed Discrete Process Simulation

With the growing scale and complexity of simulation projects, stand-alone simulation models are b... more With the growing scale and complexity of simulation projects, stand-alone simulation models are becoming too limited to support the design phase in a sufficiently valid way. Besides that there is a trend to combine separately developed models and extend the use of modeled software to prototyping or even real environments. This paper describes an open, easy and general concept for distributed modeling and simulation. The concept is suitable for research, educational and commercial design environments. The concept does not require special hardware or study and is, for the sequencing part, completely transparent to the simulationist. It is implemented in the free and open source simulation tool 'TOMAS', which is based on the process approach for discrete event simulation. To show a concrete example, the concept is applied to a dimensioning problem for AGV systems.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simulation Studies of Robotized Multi Terminal Systems

Contents............................................................................................ more Contents........................................................................................................................3

Bookmarks Related papers MentionsView impact

Research paper thumbnail of PROJECT MANAGEMENT WITH SIMULATION A critical view on the critical path

A process-oriented simulation approach to project management is proposed which gives realistic st... more A process-oriented simulation approach to project management is proposed which gives realistic statistical information about total project data and about individual activities as a function of contractual completion-time. The proposed method provides the possibility to define a generic activity network, which is simulated. The activities in the network may have any statistical or tabulated completion-time distribution. A project simulation run consists of a large number of sub-runs each simulating a project realisation. A run provides statistical information with respect to project completion-times, individual activities such as the probability of activities being critical and excess probability of contract time, and information for monitoring contract critical activities during project realisation. A case of aircraft maintenance is elaborated in which the model is used to reduce the number of contract time excesses using a simple rule assigning extra capacity to activities. The rul...

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Simulation of a New Port-Ship Interface Concept for Inter Modal Transport

This study is part of the project Improved Port/Ship interface (IPSI) , supported by the EU Commi... more This study is part of the project Improved Port/Ship interface (IPSI) , supported by the EU Commission. The general objective of the project is to strengthen the economic position of waterborne transport, especially short sea shipping. In the IPSI-concept, the terminal is the central point of inter modal logistic chains. This paper concerns a simulation study, with the overall objective to prove that the IPSI-terminal concept can work under realistic conditions. The innovative terminal concept allows horizontal loading and unloading of seagoing ships by Automatic Guided Vehicles [AGVs] , and is designed for fast throughput and short in-port times. The simulation shows that maximum capacity of the IPSI-terminal is 1.75 million twenty feet container equivalents (TEU) per year. Guidelines are derived for terminal design taking into consideration the terminal dimensions, cargo flow characteristics, equipment characteristics and desired service levels for all modes of transport

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Problem Oriented Modelling and Simulation

This paper proposes to combine the ‘systems approach’ technique with process-oriented modelling a... more This paper proposes to combine the ‘systems approach’ technique with process-oriented modelling and simulation. The process-oriented modelling concept, in which a system is decomposed into a set of component classes, each with a specific data structure, processes and mutual interactions fits well to the general concept of ‘systems approach’. The advantages of this are that during the design phase the modelling can be ‘problem oriented’ and furthermore a hierarchical structure can be designed. Combining this approach with a modern software platform provides opportunities for flexible modelling an reuse of component classes. As an example the modelling of part of a container terminal is shown. An absolute demand on a simulation tool for practice is its speed and the capability to manage large-scale models. A simple benchmark has been worked out in a process-oriented package ‘TOMAS’, the kernel of which is a fast sequencing mechanism for managing parallel processes.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Transparent Distributed Discrete Event Modeling

Stand-alone modeling and distributed modeling show considerable differences in methodology and am... more Stand-alone modeling and distributed modeling show considerable differences in methodology and amount of modeling effort needed. An approach is discussed to design and develop distributed models with the ease of stand-alone modeling and without the overhead usually associated with distributed modeling. The main objective is to obtain interchangeability of a stand-alone model and its distributed equivalent, maintaining the model structure in all models and to minimize code alteration and overhead. Important requirements are reproducibility of simulation experiments and model integrity. The process interaction modeling approach appears to be very appropriate for this. Most attention is paid to the interaction between model elements in stand-alone as well as distributed models. Some examples are show in pseudo language and demands on simulation software are derived.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Applied Distributed Discrete Process Simulation

With the growing scale and complexity of simulation projects, stand-alone simulation models are b... more With the growing scale and complexity of simulation projects, stand-alone simulation models are becoming too limited to support the design phase in a sufficiently valid way. Besides that there is a trend to combine separately developed models and extend the use of modeled software to prototyping or even real environments. This paper describes an open, easy and general concept for distributed modeling and simulation. The concept is suitable for research, educational and commercial design environments. The concept does not require special hardware or study and is, for the sequencing part, completely transparent to the simulationist. It is implemented in the free and open source simulation tool 'TOMAS', which is based on the process approach for discrete event simulation. To show a concrete example, the concept is applied to a dimensioning problem for AGV systems.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Production Scheduling of Complex Jobs with Simulation

A simulation approach is presented for planning and scheduling a flow of complex jobs for job sho... more A simulation approach is presented for planning and scheduling a flow of complex jobs for job shop like production systems. Machines may have their own specific restrictions and properties such as relative production speed, set up characteristics and scheduling rules. A production job consists of a set of tasks represented by a directed activity network in which an activity is defined as a single task to be processed on a machine. As a consequence a machine may also be an assembly station. The task duration may be stochastic having any probability distribution. The task flow and the task selection for scheduling is governed by agents: Each machine group acts as an agent combining tasks and machines. Each task acts as an agent guarding the proper network sequences of its job by determining when it is ready for releasing and, after that, controlling its own scheduling priority. A job acts as an agent repeatedly updating critical path analysis for its tasks. For that purpose a separate...

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