Statistical Tolerancing Based On Consumers Risk Considerations

R G. Easterling
M E. Johnson
T R. Bement
C J. Nachtsheim

Abstract

In a production process it is necessary to specify tolerances for characteristics, such as dimensions within which the measured characteristic must fall in order for the part to be acceptable. Such tolerances may often be set informally, but a consideration of measurement error and the attendant risks of incorrect decisions can be helpful in establishing appropriate tolerances. We consider five measures of consumer's risk and evaluate them with respect to computational convenience, information requirements, rationale, and economic considerations.