Invention starts from perceiving a need and how it can work.

Dynamic system left to itself uneffected by outside forces so that its total energy cannot alter any spontaneous change within the system occurs so that the action has its least possible value during the interval covered by the change

Experimentation consists of an orderly analysis of separated functional elements.

Assessments
1 - Technological
2 - Marketing
3 - Economic

Selection is enhanced by careful consideration of best alternatives.