Workload control concepts in job shops: a critical assessment

Article Abstract:

The impact of workload control concepts (WLC) in job shops is analyzed. WLC concepts create a pool of unreleased jobs that protect the shop floor from external dynamics. However, these also assume that the shop floor situation is stationary, creating doubts on whether stationarity assumptions are valid. It is argued that the changing release quantities of existing WLC concepts neglect the normal variability of stationary characteristics.

Machine Job Shops, Machine Shops, Industrial machinery, not elsewhere classified, Analysis, Machine-shop practice, Machine shop practice

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Direct database-simulation of a job-shop

Article Abstract:

A new methodology has been developed for scheduling the production process in a job-shop environment. The proposed method uses relational database data as a simulation model. This model contains all the required information for system definition and allows easy access to the final simulation output of the operations plan. The method has been proven to be capable of improving various performance measures by as much as 20%.

Models, Relational databases

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Shaping the organization of order processing with the simulation tool FEMOS

Article Abstract:

The FEMOS simulation tool is used to redesign the organizational structure of the production system of an engineering firm. The main objective of redesign is to improve order processing activities involving a competition of orders on limited department capacities. Simulation results show that a customer- respective-order-oriented organizational structure offers a number of advantages over a function-oriented structure.

Production Management, Technology application, Reengineering (Management)

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