Match-up scheduling under a machine breakdown

When a machine breakdown forces a modi®ed ̄ow shop (MFS) out of the prescribed state, the proposed strategy reschedules part of the initial schedule to match up with the preschedule at some point. The objective is to create a new schedule that is consistent with the other production planning decisions like material ̄ow, tooling and purchasing by utilizing the time critical decision making concept. We propose a new rescheduling strategy and a match-up point determination procedure through a feedback mechanism to increase both the schedule quality and stability. The proposed approach is compared with alternative reactive scheduling methods under di€erent experimental settings. Ó 1999 Elsevier Science B.V. All rights reserved.