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Prophets have always run the risk of being disregarded in their own land. Many champions of organizational change face the same problem as the prophet--their message is clear, but it is not attended to by those in positions of power to make the necessary changes.

This paper describes the evolution of the structure and representation of Capability Maturity Modelssm and various components of the ISO/IEC 15504 (PDTR) product set, formerly known as ‘SPICE’ (Software Process Improvement and Capability dEtermination). ‘15504’ will be used as shorthand for the product set encompassed by the 15504 project. The paper focuses on historical, structural, and conceptual evolution of the two product types. © 1997 John Wiley & Sons Ltd