For the modern industry practice, a best design
of any product aims to shift resources to the creative design process rather
than relying on inspection to ensure quality. A quality characteristic is
identified, and quality is achieved by minimizing deviation from its target
rather than mere conformance to specification. To achieve these purposes, a
Robust design is then defined as
A Design is Robust When the Product Performance is minimum sensitive to:
The Robust Design has minimal standard deviation
of limit state function. The minimal variation means the highest reliability.
This is illustrated in the following figure.
Figure 1. The Robust Design reaches the highest reliability
Input of Robust Design:
Typical Output of Robust Design: