Open Order Rescheduling in Job Shops with Demand Uncertainty: A Simulation Study

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Abstract
This paper addresses the problem of open order rescheduling in a job shop. Results are reported of experiments conducted in a simulation model of an 8‐machine job shop. Four different order updating policies are examined. The due‐date process is modeled to include several realistic features about the pattern of due‐date variability. These features are parameterized and tested at several levels. Tardiness results indicate that open order rescheduling is beneficial only when allowances are loosely set. The results indicate that inventory performance is improved by order rescheduling, particularly in cases when due dates are revised to earlier times than originally forecast.