Marco Frosolini - Academia.edu (original) (raw)

Papers by Marco Frosolini

Proceedings of the 31st European Safety and Reliability Conference (ESREL 2021)

International Journal of Productivity and Performance Management

PurposeThe paper proposes a new workforce effectiveness metric that is a sophisticated evolution ... more PurposeThe paper proposes a new workforce effectiveness metric that is a sophisticated evolution of a pre-existing overall labour effectiveness (OLE) indicator. The KPI, named revised OLE (ROLE), provides a structured methodology to measure in a holistic way the losses relating to labour, maintaining some formal similitude to the overall equipment effectiveness (OEE)Design/methodology/approachA new structure of losses is proposed to overcome the drawbacks and the difficulties that usually affect the data collection stage, referring to directly measurable quantities or, when this is not the case, suggesting a viable method to quantify the loss. Besides, this approach facilitates the comprehension of labour-related issues, suggesting potential countermeasures. The novel ROLE indicator has been defined, based on this new structure, to evaluate the labour effectiveness in batch process industries. A real case study is provided, which explains the methodology and illustrates the capabili...

Buildings

Engineer-to-order (ETO) construction companies are characterized by an off-site and on-site produ... more Engineer-to-order (ETO) construction companies are characterized by an off-site and on-site production. Often, budget deviations for installation works on-site are identified in a late stage when improvement actions cannot be applied anymore. Consequently, installation tasks are often affected by significant delays and/or reworks. This work proposes a "real-time" capable approach for planning and monitoring in construction and a corresponding information technology (IT) framework. The core is represented by the so-called "pitching" concept known from lean management, which breaks down large job orders into smaller controllable parts. It can be considered as the main enabler for gathering management information in real-time and to identify problems and their causes on time. The most noticeable consequence lies in smaller jobs and a software-aided punctual control that allows a better rescheduling capability and, thus reduced, delays. A case study is provided, showing how the model was applied and validated in an ETO façade supplier company.

The general objective of the research is to increase the use of sustainable means of transport in... more The general objective of the research is to increase the use of sustainable means of transport in urban areas, to improve air quality through good mobility practice rewarding or of mobility demand management systems (credit market mobility-tradable mobility credit) made by monitoring individual trips. After a first analysis of the existing mobility demand management systems, it is described the use of rewards/incentive as one of the possible solutions. The use of ITS to monitor all available mobility modes is analyzed and the lack of ITS to monitor daily bicycle mobility is underlined. Behind this problem, the paper presents the SaveMyBike project and its solutions.

Journal of the Operational Research Society, 2016

The International Journal of Advanced Manufacturing Technology, 2016

2016 IEEE 16th International Conference on Environment and Electrical Engineering (EEEIC), 2016

Applied Stochastic Models in Business and Industry, 2015

ABSTRACT This paper considers the management of safety stock in a coordinated single-vendor singl... more ABSTRACT This paper considers the management of safety stock in a coordinated single-vendor single-buyer supply chain under continuous review and Gaussian lead-time demand. The lead time is supposed controllable, and shortages are not allowed. We follow the present value criterion by considering both inflation and time value of money. Our aim is to present a novel approach to optimizing the safety stock in such system. Under the conditions considered, the safety stock is typically determined according to the value assigned to the safety factor, which is thus treated as a parameter of the model, and not as a decision variable. In this paper, we take a different perspective by putting the order quantity and the safety factor in functional dependence through the adoption of a specific parameter. More precisely, we express the service level as a function of the number of admissible stockouts per time unit and the order quantity. This allows optimizing the safety stock taking into account the constraint on the number of admissible stockouts per time unit. We present both exact and approximated minimization algorithms. Numerical examples are finally shown to illustrate the effectiveness of the approximation algorithm, and to investigate the sensitivity of the model with respect to variations in some fundamental parameters. Copyright © 2015 John Wiley & Sons, Ltd.

International Journal of Mathematics in Operational Research, 2016

Journal of Manufacturing Technology Management, 2009

Purpose Overall equipment effectiveness (OEE) is the key metric to measure the performance of i... more Purpose Overall equipment effectiveness (OEE) is the key metric to measure the performance of individual equipment. However, when machines operate jointly in a manufacturing line, OEE alone is not sufficient to improve the performance of the system as a whole. The purpose ...

International Journal of Industrial and Systems Engineering, 2015

ABSTRACT The present paper is aimed at investigating, through simulation, the behaviour of the PO... more ABSTRACT The present paper is aimed at investigating, through simulation, the behaviour of the POLCA method when a make-to-order (MTO) production system is highly unbalanced, in terms of both routings and times. In particular, the study is addressed to verify: 1) the effective capability of the POLCA method to improve the uncontrolled system; 2) the impact of how orders are processed at each workstation, to show that POLCA performance can be further improved in such circumstances by adopting an appropriate selection rule. Germs and Riezebos (2010) proved that POLCA is very effective in reducing the total throughput time (TTT) with respect to the corresponding unconstrained production systems. Owing to this, it appears evident that POLCA represents a valuable and effective make-to-order (MTO) production control method. However, they only considered balanced systems, hence some observations must be carefully addressed. In fact, often, in real world applications, the systems to be controlled are designed to process units with very different routings, each with significantly different probability to occur. Copyright © 2015 Inderscience Enterprises Ltd.

Reliability Engineering & System Safety, 2013

ABSTRACT Inventory pooling occurs when different actors share their inventories with the aim of r... more ABSTRACT Inventory pooling occurs when different actors share their inventories with the aim of reducing costs while improving performances. The paper-making industry requires large amounts of ready to install spares aimed at assuring high availability, but presents the drawback of excessive inventory costs. Pooling inventories, with the support of appropriate IT solutions, can be considered an effective strategy to improve availability while reducing the total costs. In the present work a real-life implementation within an important Italian paper-making district has been successfully carried out. Throughout the study the most recent theoretical models have been adapted after a methodical analysis that has been devoted to allow the identification and of the most significant issues and the building of a wide and solid agreement among the participants. Indeed, this required a thorough investigation, since the involved actors are generally competitors and only agree to pool inventories if this leads to increasing profits for themselves.

International Journal of Industrial Engineering Computations, 2011

This paper focuses on routing flexibility, which is the ability to manufacture a part type via se... more This paper focuses on routing flexibility, which is the ability to manufacture a part type via several routes and/or to perform different operations on more than one machine. Specifically, the paper presents a comprehensive method for the measurement of routing flexibility, in a generic manufacturing system. The problem is approached in a modular way, starting from a basic set of flexibility indexes. These are progressively extended to include more comprehensive and complex routing attributes, such as: the average efficiency, the range and the homogeneous distribution of the alternative routes. Two procedures are finally proposed to compare manufacturing systems in terms of routing flexibility. The first one uses a vectorial representation of the previously defined indexes and the second one is based on data envelopment analysis, a multi-criteria decision making approach. The paper concludes with a numerical example, supported by discrete event simulation, which validates the proposed approach.

Kirk-Othmer Encyclopedia of Chemical Technology, 2000

International Journal of Logistics Systems and Management, 2014

Computers & Industrial Engineering, 2014

ABSTRACT In this technical note, an alternative solution procedure to the model that Glock (2011)... more ABSTRACT In this technical note, an alternative solution procedure to the model that Glock (2011) developed is presented. In particular, we take into account the same assumptions, but the total cost function is reformulated, i.e., the step-type discontinuity is replaced by a logistic approximation and the total costs of the system are computed on the whole set of preselected suppliers. Subsequently, we show that the total cost function possesses some properties in terms of convexity and continuity that allow the exploitation of standard constrained nonlinear minimization algorithms. Finally, tests conducted on the same set of problems that Glock (2011) originally considered illustrate the good performances of the solution procedure developed in this note.

International Journal of Mathematical Modelling and Numerical Optimisation, 2014

ABSTRACT This paper aims at presenting a revisited and extended version of the injury theory, ori... more ABSTRACT This paper aims at presenting a revisited and extended version of the injury theory, originally developed by Ramalingam and Watson (1977) and Ramalingam (1977). This theory allows deriving tool-life distributions when either a single catastrophic event or a gradual and cumulative wear process terminates the tool useful life. Since these models cover great importance in tool-life modelling, this paper would contribute in this direction with further observations and results, giving special attention to the mathematical formulation. In particular, besides deriving known results following a different approach, we extend the theory to the case of multiple machines with both single- and multi-tool configurations. Moreover, as examples we derive different expressions of the tool-life distribution in the cases studied related to particular formulations of the injury rate. Copyright © 2014 Inderscience Enterprises Ltd.

Strategic Outsourcing: An International Journal, 2009

Design/methodology/approach Starting from an industrial application of relevance, the informati... more Design/methodology/approach Starting from an industrial application of relevance, the information flow and the technical details, which are to be defined before the operation startup, are identified and discussed. These data are used as the key points for the definition of the basic frame ...

Reliability Engineering & System Safety, 2012

ABSTRACT The paper presents a multivariate statistical approach that supports the classification ... more ABSTRACT The paper presents a multivariate statistical approach that supports the classification of mechanical components, subjected to specific operating conditions, in terms of the Mean Time Between Failure (MTBF). Assessing the influence of working conditions and/or environmental factors on the MTBF is a prerequisite for the development of an effective preventive maintenance plan. However, this task may be demanding and it is generally performed with ad-hoc experimental methods, lacking of statistical rigor. To solve this common problem, a step by step multivariate data classification technique is proposed. Specifically, a set of structured failure data are classified in a meaningful way by means of: (i) cluster analysis, (ii) multivariate analysis of variance, (iii) feature extraction and (iv) predictive discriminant analysis. This makes it possible not only to define the MTBF of the analyzed components, but also to identify the working parameters that explain most of the variability of the observed data.The approach is finally demonstrated on 126 centrifugal pumps installed in an oil refinery plant; obtained results demonstrate the quality of the final discrimination, in terms of data classification and failure prediction.

Quality and Reliability Engineering International, 2003

Abstract In this paper, an alternative multi-attribute decision-making approach for prioritizing ... more Abstract In this paper, an alternative multi-attribute decision-making approach for prioritizing failures in failure mode, effects and criticality analysis (FMECA) is presented. The technique is specifically intended to overcome some of the limitations concerning the use of the ...