Coupling is the term Axiomatic Design uses to describe a lack of independence between the FRs of the system as determined by the DPs.
The metric is normalized to be summed up for the entire system being modeled.
Systems with less functional performance risk (minimal information content) are preferred over alternative systems with higher information content.
Suh Nam Pyo at MIT, Department of Mechanical Engineering since the 1990s.
A series of academic conferences have been held to present current developments of the methodology.