These definitions are a little different from what we already know. Throughput is dependent on marketing, not production. And all machines, facilities and even factory itself are included in the inventory because they are able to be sold in the market. The salary of the personal driver for a CEO is included in the operational expense because he helps CEO travel conveniently. These novel definitions can relate all activities in the plant to the goal of making money. So, it is very important to understand and manage these measurements.