Why is the production of large lots could cause problems of over-production. Of course, high production capacity will lead to other problems that could hamper lean manufacturing project ever campaigned by the company. Of course there are specific strategies that must be done to produce in large quantities. Production of large quantities could be due; 1. Customer Demands Products will be manufactured on a large scale because of the order of market / customer, thus forcing the production line to achieve the target time and the capacity of the product. The risk posed by these cases is very small because the product is directly absorbed by the market. Possible risks faced were the possibility of machine breakdown due to being forced to reach the target with a large capacity. If there is one machine that is damaged there will be a WIP is still waiting queue for processing. This is what can lead to waste because it takes place and energy to manage it.