Abstract: In type’s production management techniques, operation research is one of the most powerful techniques for purpose of shopfloor management decision making. The application of the techniques are helped to solve many complex problem regarding with assembly controlling, scheduling which otherwise are more difficult to solve. To the survival and growth of an industry product mix decision is an important planning activity. Single-product assembly line used for making mass production and mix-product lines used to assemble different shape and size product. There are many constraints under which the product mix decision is to be made.

Keywords: Operation research, Production scheduling, Product mix decision.