Abstract: Assembly is an important manufacturing process in terms of mass production system. Significant research has been done in the Design and operations of assembly systems in support of high product variety, but many opportunities exist for future research. The paper contains practical mapping and product flow from start to finish. The information would highly assist the researcher to visualize the current state of the activity mapping the material and information flow. In this paper first review the state of the art research in the areas of assembly system design, planning and operations in the presence of product variety. Work measurement is essential for both the planning and control of operation.

Keywords: Design, Planning, Operation, Work measurement.