This system will reduce the complexity and the requirement for a skilled planner. Process plans are
developed in less time and cost, and it increases the overall improvement of the production.
There are three categories of CAPP systems. These are VCAPP(Varient), GCAPP(Generative), and S CAPP(Semi -
Generative). VCAPP, also known as the bottom-up approach is illustratod in Figure 2(a). In this
approach computer is used as a tool for information retrieval and text editing. Process plans are stored
in the database and a standard plan for a part which is similar to the new design is retrieved and then
updated. It requires the experienced process planner, although the process is partially automated.
GCAPP, also known as the top-bottom approach is illustrated in Figure 2(b). In this approach, the
system will develop a new process plan for every new design. This system takes advantage of the new
technologies in the information management systems and knowledge engineering. In this approach, the
knowledge associated with processing steps and their capabilities are structured in a standardize process
planning procedure. S6CAPP uses both techniques. This technique is known by industries to be the only
feasible approach to design of a CAPP system.