Correlation-Capability Studies

In missile production, a recurring problem is the measurement of derived parameters. Unlike volts, amperes, and ohms, these parameters do not lend themselves to standard black-box test equipment. Nevertheless, whatever test equipment is used for their measurement still must be closely correlated to yield consistent and reliable measures. The Span Plan, which has been successful largely because it uses range estimates rather than actual variances, has shown itself to be the most practical method for conducting correlation studies on Sidewinder missile test stations. After discussing the Span Plan in some detail, the author concludes that the Correlation Capability Program, in establishing and maintaining close correlation of test stations, has been a significant contributor to Sidewinder´s success.