This study considers scheduling in Hybrid flow shop environment with unrelated parallel machines for minimizing mean of job's tardiness and mean of job's completion times. This problem does not study in the literature, so far. Flexible flow shop environment is applicable in various industries such as wire and spring manufacturing, electronic industries and production lines. After modeling the p...

Background: Ergonomics is a science that provides methods of creating reasonable adaption between occupation and worker by improving usability through consideration of job demands and human ability to satisfy them. A deep understanding of user’s thoughts on and attitudes toward utilizing a tool could improve its design. In the present study, two cushions designed particularly for one of c...

In this paper we consider the programming of job rotation in the Assembly Line Worker Assignment and Balancing Problem. The motivation for this study comes from the designing of assembly lines in sheltered work centers for the disabled, where workers have different task execution times. In this context, the well-known training aspects associated with job rotation are particularly desired. We pr...

background: ergonomics is a science that provides methods of creating reasonable adaption between occupation and worker by improving usability through consideration of job demands and human ability to satisfy them. a deep understanding of user’s thoughts on and attitudes toward utilizing a tool could improve its design. in the present study, two cushions designed particularly for one of car ind...

In this paper, we propose a new model for designing integrated forward/reverse logistics based on pricing policy in direct and indirect sales channel. The proposed model includes producers, disposal center, distributers and final customers. We assumed that the location of final customers is fixed. First, a deterministic mixed integer linear programming model is developed for integrated logistic...

Abstract In this paper, we propose a new linear programming-based approach that enables the consideration of technical car sequencing rules in master production scheduling mixed-model assembly lines at much higher level detail than previous approaches. To end, investigate certain interdependencies rules, which have largely been neglected, both practice and research literature. We illustrate exi...

Many industrial processes involve making parts with an assembly of machines, where each machine carries out an operation on a part, and the finished product requires a whole series of operations. A well-studied example of such a factory structure is the transfer line, which involves a sequence of machines. Optimizing transfer lines has been a subject of much study in the industrial engineering ...

in this study, a new stochastic model is proposed to deal with a multi-product, multi-period, multi-stage, multi-site production and transportation supply chain planning problem under demand uncertainty. a two-stage stochastic linear programming approach is used to maximize the expected profit. decisions such as the production amount, the inventory level of finished and semi-finished product, t...