The way I like it: determine functionality, performance, and solve problems in economics, master financial, material, time, capacity of people and machines in production.
My favorite is the nature of the functions assigned to the most powerful. And solve problems with the economics of the production capacity of the material. Manufacturing and Machinery
The job I like is to consider the work efficiently. And solve the problem about the principles of economics in the use of materials, time, the capacity of the people and machines in the manufacturing .