The sensitivity of jobshop due date lead time to changes in the processing time

This paper provides a procedure for calculating the sensitivity of the production lead time to the average job processing time for a single machine problem under a general priority rule using simulation. The aim of this work is to develop sensitivity routines, for queues with any non-preemptive priority rule, to calculate the sensitivity of the due date lead time to the average jobs processing time. Though GI/G/1 queuing model is given, the same methodology can be extended to GI/G/m queuing model. The new algorithm is valid for the SPT, LPT and FCFS priority rules.