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This study intends to help manufacturers that use flexible job shops improve performance of due date assignment, that is, setting delivery times to jobs that arrive dynamically. High performing due date assignment enables achieving on-time delivery and quick response of delivery time to customer orders. Traditional methods for due date assignment are predefined equations that estimate the durat...

We consider the problem of common due window location scheduling on a single machine, where the processing times of jobs depend both on their starting times and positions in a sequence. The problem is to determine the optimal earliest due date, the due window size, and the job schedule simultaneously to minimize costs for earliness, tardiness, earliest due date assignment and due window size pe...

  This paper deals with minimization of tardiness in single machine scheduling problem when each job has two different due-dates i.e. ordinary due-date and drop dead date. The drop dead date is the date in which jobs’ weights rise sharply or the customer cancels the order. A linear programming formulation is developed for the problem and since the problem is known to be NP-hard, three heuristic...

Limits on Efficient Computation in the Physical World