Importance

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Abstract

Described herein is a method of controlling the effect of raw materials on manufacturability in which constituents in a product are controlled in a simple and effective manner prior to the constituents being committed to the manufacturing process for that product. This is achieved by deriving the T.sup.2 parameter from a number of important properties of the constituents which are known to impact performance characteristics of a final product, the derived T.sup.2 value being compared with a standard for that product. If the value of T.sup.2 exceeds a predetermined limit, there is an indication that there has been a significant change in the typical properties of the constituents and action can be taken to replace defaulting constituents prior to manufacturing. Replaced constituents can then be used at another time so as to avoid irretrievable loss, for example, waste.

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First Claim