The PRIMARY focus of a post-implementation review is to verify that:

The primary focus of a post-implementation review (PIR) is to determine whether a project has achieved its intended objectives and delivered the expected benefits to the business. This is fundamentally measured by assessing if the system, once operational, has successfully met the user and business requirements that were defined at the project's outset. The PIR serves as a final validation that the investment in the system has resulted in tangible value and that the solution effectively addresses the needs it was designed to solve.

A. Verifying compliance with enterprise architecture is a concern addressed during the design and development phases, not the primary focus of a post-implementation review.

C. Verifying the proper execution of acceptance testing occurs before the system goes live; a PIR evaluates the system's actual performance and value in the production environment.

D. Assessing the adequacy of user access controls is a specific control objective that is part of the overall review, but it is not the primary, overarching focus.

1. ISACA. (2019). CISA Review Manual

27th Edition. Page 151. The manual states

"A post-implementation review is conducted after the system has been in operation for a period of time and is a review of whether the project has met its objectives." It further clarifies that this includes assessing "whether the system meets user requirements and business needs."

2. Weber

R. (2012). Information Systems Control and Audit. Pearson. Chapter 17

Section on "Post-Implementation Review

" explains that the review's purpose is to evaluate the new system against its initial objectives

with a key criterion being the satisfaction of user requirements and the realization of projected benefits.

3. ISACA. (2018). "Post-implementation Review: A Key to Project Success." ISACA Journal

Volume 4. The article emphasizes that a PIR's main goal is to "determine whether the project objectives were met

assess if the project delivered the expected benefits to the business

and identify lessons learned." The project objectives are fundamentally derived from user requirements.