Method study of calculating and controlling work-in-process

The focus of this paper is to study two methods of calculating the work-in-process as applied to manufacturing system. A teamwork chart is given to figure out the composing and related quantity of work-in-process when we focus on comparatively simple process or parts of a complex process. But when we focus on more complex production process, an I-O curve is introduced instead of teamwork for more easily studying the quantity of work-in-process. Moreover, the paper discusses the main factors which affect the quantity of the work-in-process and illustrates how to better control and monitor them.