Abstract
In recent manufacturing, environmental changes such as small lot sizes, shifting production overseas, the use of temporary workers and worker motivation occur in assembly work, and a new assembly system called Cell Production System, which has self-completion stations as well as traditional assembly lines with the division of labor and conveyors, has been introduced. The operation efficiency of assembly systems should be discussed under the application of viable demands since the workloads determined by cycle times and the number of stations are constant. This study strategically compares the assembly line systems (ALS) to the cell production system including the flexible cell system (FCS) under the application of viable demands using the pair matrix table applying the production lot sizes and the number of stations, and discusses efficient assembly systems based on demand fluctuations. First, the respective models such as ALS, autonomous cell system (ACS) and FCS are briefly summarized, and an assembly problem is prepared. Next, simulators are constructed for the respective models, and the pair matrix tables with the profit and leadtime are drawn and shown. Finally, the efficient assembly systems are discussed based on the pair matrix tables. Here, FCS consists of multiple self-completion stations connected by conveyors and is efficient in view of material flow and process, and its superiority is comparatively shown.
