I found the concept of working in small batches very interesting. I f one makes different types of products too, it important to alternate between the two products than just making product A in the morning and product B in the evening. This is called product levelling. It also involves producing goods at a fixed speed. There is standardization then. Its not the one day you produce more and the other day you produce less. By working in small batches one can detect defects more easily and reduce the lead time and changeover time. The WIP inventory is reduced.