Design for six sigma.

Design for Six Sigma

In the Six Sigma methodology, rarely will deficiencies be traced to a problem in design. If this does occur, than a system must be redesigned in order for Six Sigma success. During Six Sigma implementation, trouble spots in the process have to be identified as well as the numerous causes for each trouble. Some root causes may be design errors.

All aspects of the design can suffer from design problems. With physical assets, design problems occur in the initial phases of product development. The designer or engineer must undergo Six Sigma-based analyses, and troubleshoot the problem. This will insure successful product use, sales, and reliability.

All of Six Sigma designs begin with one equation. This equation is Y=f (x) + E, where Y is the outcome, the desired result. X, is the input. The factors, which are needed to construct the outcome. You may have several X values. The determining factor is f; this is the function (process), which the input is transformed into the outcome. E is the presence of ERROR. It is the uncertainty of depending on the Xs and the transformation function to reach the desired outcome.

In other words, because of ERROR, which sometimes may be your fault, or it could be completely random you will have variations. All outcomes (Y) are the result of some process (f) acting on the inputs (X).

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