Safety Stock Optimization in Two-Echelon Assembly systems: Normal Approximation Models
Desmet, Bram Aghezzaf, El-Houssaine Vanmaele, Hendrik
Desmet, Bram
Aghezzaf, El-Houssaine
Vanmaele, Hendrik
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Publication Type
Journal article
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Supervisor
Publication Year
2010
Journal
International Journal of Production Research
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Publication Volume
48
Publication Issue
19
Publication Begin page
5767
Publication End page
5781
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Abstract
This paper tackles the problem of optimising safety stocks in a two-echelon assembly system. It presents and discusses several approximation models for the assembly lead-time under the assumption of normality of the assembly demand and normality of components’ nominal lead times. These approximation models are subsequently used to optimise safety stocks throughout a two-echelon assembly system. They are then tested on a particular two-echelon N-identical component assembly system. The obtained results are compared with the results of a discrete event simulation. Finally, it is shown that lead-times and safety stock results already obtained for a two-echelon distribution system can also be derived without difficulty from those of two-echelon assembly systems.
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Keywords
Safety Stocks, Two-echelon Assembly, Decision Support Systems