Most processes consist of several operations. Some or all of these operations may have more than one alternative technological method, resulting in an exponential relationship between the number of possible designs and the number of operation alternatives. However, some of these designs may not...

This paper defines a model that covers the multimachine extensions of all existing flow-shop problems with time lags as well as flow-shop problems where setup, processing and release times are separated. Approximate solutions and lower completion time bounds are developed for the restricted and...