Title: A lot sizing model with queuing delays: The issue of safety time
Authors: Lambrecht, Marc ×
Chen, S
Vandaele, Nico #
Issue Date: 1996
Series Title: European Journal of Operational Research vol:89 (Mar.) issue:2 pages:269-276
Abstract: The concept of safety time in a make-to-order production environment is introduced. The production facility is represented as a queuing model, explicitly including a non-zero setup time. A methodology is presented to quantify the safety time and to compute the associated service level based on the queuing delay. The main result is a convex relationship of the expected waiting time, the variance of the waiting time and the quoted lead time as a function of the lot size and a concave relationship of the service level as a function of the lot size. Most models in the literature assume batch arrivals. That assumption is relaxed so that an individual customer arrival process is allowed. It is therefore necessary to derive a new closed form analytical expression for the expected waiting time. Both the deterministic and a stochastic case are studied
ISSN: 0377-2217
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Research Center for Operations Management, Leuven
Faculty of Business and Economics, Campus Kulak Kortrijk – miscellaneous
× corresponding author
# (joint) last author

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