Today industrial companies are subject to major and profound changes. It is constantly confronted with a world of ruthless competition that continually aims improve quality, cost, lead time. Each company works satisfy the requirements its customers do this, it improves performance controls manufacturing processes from reception raw materials suppliers shipment final product customer. In this pa...

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...

a three stage production system is considered in this paper. there are two stages to fabricate and ready the parts and an assembly stage to assembly the parts and complete the products in this system. suppose that a number of products of different kinds are ordered. each product is assembled with a set of several parts. at first the parts are produced in the first stage with parallel machines a...

Abstract The car of the future will be driven by software and offer a variety customisation options. Enabling these options forces modern automotive manufacturers to update their standardised scheduling concepts for testing commissioning cars. A flexible concept means that every chosen customer configuration code must have its own procedure. This is essential provide individual workflows where ...

We consider the problem where p searchers explore m > p half-lines, all joined at a common origin. The searchers travel at unit speed and the goal is to find a single object, or “exit” whose location is bounded away from the origin. We consider two minmax measures of effectiveness for a search strategy. The first is the worst case distancecompetitive ratio. This is the smallest value that excee...

In this article, we introduce two new variants of the assembly line worker assignment and balancing problem that allow parallelization of and collaboration between heterogeneous workers. These new line balancing approaches introduce an additional level of flexibility in the assignment and planning process, which may be particularly useful in practical situations where the aim is to progressivel...

This paper deals with the design of balanced assembly lines with parallel workstations in the case when the execution times are real sampled fuzzy numbers. The need for parallel workstations appears whenever the assembly process contains some tasks whose processing times are longer than the cycle time. The variant when the execution times are fuzzy number was considered as a better compromise b...

This research presents a Simulated Annealing based technique to address the assembly line balancing problem for multiple objective problems when paralleling of workstations is permitted. The Simulated Annealing methodology is used for 23 line balancing strategies across seven problems. The resulting performance of each solution was studied through a simulation experiment. Many of the problems c...