Approximation Schemes for Single-Machine Scheduling with a Fixed Maintenance Activity to Minimize the Total Amount of Late Work

We consider the problem of scheduling n independent and simultaneously available jobs without preemption on a single machine, where the machine has a fixed maintenance activity. The objective is to find the optimal job sequence to minimize the total amount of late work, where the late work of a job is the amount of processing of the job that is performed after its due date. We first discuss the approximability of the problem. We then develop two pseudo-polynomial dynamic programming algorithms and a fully polynomial-time approximation scheme for the problem. Finally, we conduct extensive numerical studies to evaluate the performance of the proposed algorithms. (C) 2016 Wiley Periodicals, Inc.