MFE 201 Lecture Notes - Lecture 4: Process Capability, Six Sigma, Systems Theory
31 Mar 2016
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Document Summary
Over the years the de nition of quality has evolved. One of the early de nitions was meets speci cations . The problem with this was that sometimes the speci cations did not completely satisfy the customer. Fitness for use is a better de nition because the supplier can do more than just meet speci cations by sharing their expertise. Quality is inversely proportional to variability has become a popular de nition because it recognizes the huge role that variability plays in satisfying the customer. There is not one accepted de nition for quality. In my thinking any de nition should also include or imply consideration for cost or value. Quality of design is key because no product will function better than it was designed for. Materials have a major impact on the quality of design. Tolerances experience and the use of scienti c methods can help produce tolerances that create robust designs.
