<< Click to Display Table of Contents >> Navigation:  Wadiso 6 User Guide > Optimization > Definition of Optimization Terms > Cost Functions

In the context of the optimization routine, a cost function represents a list of pipe sizes, and, for each size, an installation cost (e.g. per m or per ft). The user can specify different price functions, so that, for example a 300 mm pipe to be installed under a city street will cost more than a 300 mm pipe installed in a new subdivision. This cost relationship can hold (if so designated) even if both 300 mm pipes are in the same group. Other examples: One cost function may refer to the cost for ‘average conditions’, a second function for shallow pipes, a third one for deep pipes, a fourth one for typical city conditions, etc. Each pipe to be sized is assigned to a cost function. Pipes in the same group may be assigned to different cost functions.