Achraf Ammar

Achraf Ammar
Université Clermont Auvergne | Univ BPC · computer science

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9
Publications
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101
Citations

Publications

Publications (9)
Article
The Taguchi method is widely used in the field of manufacturing systems performance simulation and improvement. On the other hand, Arena/OptQuest is one of the most efficient contemporary simulation/optimization software tools. The objective of this paper is to evaluate and compare these two tools applied to a flexible manufacturing system performa...
Article
Adaptive card control strategy-based heuristics are used to change the number of cards dynamically in response to stochastic and fluctuated customers’ demands. However, when the decisions are taken in real-time and without the use of forecasts, existing heuristics may yield to change too often the number of cards. This over-correction, related to s...
Article
Manufacturing systems are often characterized by a stochastic and uncertain behavior in which frequent changes and unpredictable events may occur over time. Moreover, the customers’ demands can sometime evolve drastically along time. In order to cope with such changes in the manufacturing system state, and to optimize given performance criteria, th...
Conference Paper
In order to cope with the frequent unpredictable changes that may occur in manufacturing systems, and to optimize given performance criteria, the assignment of workers can be decided online in a dynamic manner, whenever the worker is released. Several studies, in the ergonomics literature, have shown that individuals' performances decrease because...
Conference Paper
Full-text available
In this paper, we address team configuration problems in manufacturing systems, which consist in defining the number of workers to be assigned to a production system, as well as the skills that each worker must have in order to meet several performance measures. This problem is studied in a stochastic production context. A multi-objective evolution...
Conference Paper
Full-text available
Workers assignment problems (WAPs) are found in several types of manufacturing systems. Typically, WAPs are known to greatly impact the system performance. Numerous research works related to WAPs have been published. In this work, we analyze this literature according to several types of criteria. We first take into account such important features o...
Conference Paper
Full-text available
Assigning workers to machines dynamically, so as to achieve production objectives, is known as a difficult problem which must be addressed in several manufacturing systems. In fact, production managers must determine when and where to assign workers, which is a very difficult task because of the complexity induced by the dynamic changes and the sto...
Article
This paper addresses a worker assignment problem where multi-skilled workers perform a set of tasks independently and without walking and work sharing between workstations. A real case study is considered in this work. This problem is solved as a non-identical parallel machines scheduling problem with stochastic processing time where each machine r...

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Projects

Projects (2)
Project
manufacturing system optimization
Project
To improve the attractiveness for investment and to meet market requirements of competitivity, in terms of performance, quality, and sustainability, both Morocco and Tunisia need to support industrialization. Therefore, both countries have adopted sustained strategies to support industrial companies to modernize their hardware, software and “humanware” infrastructures through embracing the industry 4.0 paradigm and technologies. The ENHANCE project (2021-2024) is co-funded by the Erasmus+ Programme of the European Union and focuses on developing a knowledge transfer framework and mechanisms to address three main topics, which we refer to by MPQ4.0 (Maintenance, Production, Quality).