en و موضوعات مربوط Other Related Subject پژوهشي Research <p>  This paper proposes two relax and fix heuristics for the simultaneous lot sizing and sequencing problem in permutation flow shops involving sequence-dependent setups and capacity constraints. To evaluate the effectiveness of mentioned heuristics, two lower bounds are developed and compared against the optimal solution. The results of heuristics are compared with the selected lower bound . </p> Capacitated lotsizing problem; Permutation flow shop; Sequence-dependent setups; Relax and fix 147 153 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-10-1&slc_lang=en&sid=1