appropriate scheduling and sequencing of tasks on machines is one of the basic and significant problems that a shop or a factory manager encounters; this is why in recent decades extensive studies have been done on scheduling issues. one type of scheduling problems is just-in-time (jit) scheduling and in this area, motivated by jit manufacturing, this study investigates a mathematical model for...

This paper presents a novel, integer-linear programming (ILP) model for an identical parallel-machine scheduling problem with family setup times that minimizes the total weighted flow time (TWFT). Some researchers have addressed parallel-machine scheduling problems in the literature over the last three decades. However, the existing studies have been limited to the research of independent jobs,...

In the Weighted Total Acquisition problem (WTA) on a weighted graph G (only positive non-zero weights), vertex v can acquire total weight of neighbour u if and only current is at least that u. The new then zero, sum weights just before acquisition. Over all possible acquisition sequences in with function w, minimum number vertices end denoted by at(G,w). Given G, weighting an integer k?1, WTA a...

in this research the effect of two different methods of carcass chilling (immersion and evaporative) in the poultry industrial slaughter line on microbial load and carcass weight changes was studied. for sampling, after evisceration, each carcass weighted and rinsed with 250 ml of sterile water in a plastic bag. 25 ml of rinses water was taken and into sterile scaled container sent to laborator...

In the present work, an industrial case study has been considered for multi-objective flow shop scheduling problem including the sequence dependent set up time. The multi-objectives include the minimization of sum of total weighted squared tardiness, total weighted squared earliness, makespan and number of tardy jobs. Industries can select the optimal sequence with respect to required objective...