Multi Objective Flexible Jobshop Scheduling Problem using Heuristic Algorithm

Flexible workshop problem (FJSP) is an extension of the classic job shop problem (JSP) that allows one operation that can be performed from a collection of alternative machines on a single machine. It is closer to the actual condition in manufacturing. Due to the additional conditions to assess the allocation of system operations, FJSP is more It's also a typical problem in combinatorial optimization. But the difference is that all the workers in the shop floor may or may not be handled in all the computers. In just one machine or two machines, a job can be processed or a separate task in all machines may have to go through the processing in order to be finished. Each computer has different work sequences. So it's an internet str complex. The classical workshop scheduling problem varies from the problem of the flow shop and the work flow is not unidirectional. It is more complex than JSP, combining all JSP's problems and complexities. All workers have the same operations series. In this field, in the objective of minimizing "make period time" and mean flow time, the problem is considered with bi-criteria.. nitially manual calculation is done with the question of literature and then with the method of Gantt chart for collecting industrial data.

Modeling for Materials and Logistics Optimal System in JIT Flexible Manufacturing

In this paper, we propose an autonomous material and logistics optimization system model for JIT flexible jobshop. The proposed system consists of a Material Planning subsystem (MPs), a Distribution Planning subsystem (DPs) and a Logistics Control subsystem (LCs). In the proposed system, all subsystems repeat their own optimal decision making as well as exchange production data with others. This mechanism made the whole system a closed-loop information and control system for material and logistics optimization. The unified model constructed up a framework for integrating of the production management, optimal and control in JIT flexible jobshop, through feedback of static materials management information and dynamic logistics information. Unified modeling language (UML) was used as the modeling tool, and several diagrams, including a use cases diagram, a interaction diagram and a sequence diagram, were presented to illustrate the details of the proposed model.