Errors of Measurement with More Than Two Measurement Methods

In safeguards applications, it often happens that two measurement "methods" are used to make measurements of the same items. "Methods" is used in a general sense, and the problem includes such typical situations as occur when the shipper and receiver make measurements on the same items, when an inspector makes measurements on sampled items and compares his results with the operator's values for those items, and when an analytical laboratory wishes to compare two analytical techniques by measuring the same items by both techniques.