Following points taken into considerations for determine stages of inspection.
1. Type of production system. i.e. Job, batch or mass etc.
2. Nature of product i.e. complex which consist of more number of parts or simple one.
3. Process selected for manufacture which consist of simple or complex operations or which consist of cheap or costly operations.
4. Type of layout i.e. line layout or functional layout etc.
5. Finding the key operations in process responsible for the essential function of the product.
6. The cost incurred on inspection i.e. money spend on inspection and cost of allowing defective parts per lot.
Significance of operation sheet.
1. The operation sheet gives the information that is very vital to process engineer.
2. It helps the supervisor to know which operation is being performed on the job.
3. It helps the worker to clearly understand the drawing.
4. It also instructs the worker about the speed, feed and depth of cut to be used for particular operation.
5. It also gives the information about the time required for the operation. This can help the process engineer to schedule the similar jobs.
6. The information like the availability of machines can also be obtained from the operation sheet.
7. As the operation sheet is one of the activity in the process plan, it helps to get a systematic process plan.