Process costing is a method of costing used to ascertain the cost of production of each process, operation or stage of manufacture where processes are carried in having one or more of the following features Where the product of one process becomes the material of another process or operation Where there is simultaneous production at one or more process of different products, with or without by product, Where, during one or more processes or operations of a series, the products or materials ADVERTISEMENTS: Read this article to learn about the three oil refinery processes, i.e., (1) Crushing Process, (2) Refining Process, and (3) Finishing Process. 1. Crushing Process: In this process raw material i.e. oil seeds or coconut or copra or kernels etc. are used. Other expenses of the process are debited. Sale of bags or sacks […] A job order costing system would be more appropriate than a process costing system for manufacturers who use different types of goods throughout the manufacturing process. Process costing is best