The Function Analysis is a very powerful analysis tool from TRIZ. It helps to understand all the components of a system and functions they perform and their relationships to other components.
A function is anything that changes a parameter of the target component. It must be very precise. It also lists the interaction with the environment ("super system").
Function Analysis can be used to understand problems and serves as a starting point for "trimming", a method of radically reducing components of a system.
Function Analysis can be used to analyze technical or process-related problems.
-as a basis for cost reduction e.g. by trimming components
- error reduction
- optimal design of processes, for example when other optimization methods have not yielded significant results.
-Etc.
This procedure is more comprehensive as e.g. Makigami, Six Sigma, SIPOC or Business Process Management (BPM) and can be used as a complement to them.