The Faucet Reloaded: Improving Axiomatic Design by Example

Axiomatic Design Theory and Complexity Theory have made large impacts in the research of design methodologies, but a major obstacle to widespread use is the challenge of teaching it. A standard example used for educating students on the importance of coupling in Functional Requirements involves the difference between a two-valve and a lever-type faucet. Unfortunately, this simplistic example has its limitations in implementation due to imbalances in pressure and temperature variation. Strangely enough, these limitations turn out to be inspirations for expanding the example to make it better for teaching Axiomatic Design and Complexity Theory. In this work, we update the faucet example to map it to real-world application. Secondly, the concepts of ‘Information in Design’ and ‘Complexity in Axiomatic Design’ are explained from a perspective that increases understanding and acceptation by students and learning professionals. Lastly, we highlight other illustrative examples in manufacturing including the Manufacturing System Design Decomposition.