Engineering Economy.

The sense in this system outlays involved considering the economic steps that are applied in  engineering structuring,its involvement in reduction of cost,and profit optimization.The term economy serve as a cardinal towards the development of the organization,and has an identity crisis.It involved means of controlling steps that consume exessive expenditure and a way of investment,others are as follows:1,reduction of cost and optimization of the profits
2,In this comparism steps, it uses several systems of cost axioms and concepts. And it can be grouped into categories such as 3.Future and opportunity costs,4.fixed and variable cost.5.Average and marginal costs 6.life cycle costs 7.Direct and overhead cost 8.Past or sunk cost.etc