With rapid growth of Software-as-a-Services (SaaS) products in cloud paradigm, evaluation of SaaS product is essential for an enterprise to purchase a software service whilst there are a number of alternatives. This paper proposes the primitive cognitive network process (P-CNP) approach to measure the SaaS products in multi-criteria decision making aspect. The P-CNP is the rectified approach of the Analytic Hierarchy Process (AHP) in the aspects of paired interval scale and the corresponding mathematical development. The proposed approach can support the business decision maker to select the best cloud service product through user experiences and preferences.
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