ME 234 Lecture Notes - Lecture 12: Lean Manufacturing, Orthogonal Array, Orthogonal Array Testing
Document Summary
The quality of a product is the culmination of many different philosophies, actions, and decisions that are made throughout the design and manufacturing process. Quality is a subjective term for which each person has his own definition : but it can be defined by multiple aspects that relate to the function, shape, cost, aesthetics, appearance, life expectancy, and more. For industry, quality relates to reduced variations from the nominal, but its important to note variations from the nominal desired value aren"t always bad. Post wwii philosophies (deming) america industry vs. japanese industry. It is generally impossible or too expensive to do 100% quality control testing. Used to set lower and higher acceptable limits for each product or part such that the largest and smallest counterparts will still function together in an acceptable manner. The basic problem with the concept of tolerances is the difference between desirability and acceptability.
