This paper is devoted to the calculation of the stability radius of an optimal schedule for a job shop problem, when the objective is to minimize mean or maximum flow times. The approach used may be regarded as an a posteriori analysis, in which an optimal schedule has already been constructed...

We study a planning problem of an imperfect production of a single product. The product is assumed to be continuously divisible. There are two facilities: a main facility dedicated to the original production and a facility dedicated to re-manufacturing defective units coming from the main...