In part 1, we covered basics of Conformance Diagnostics. Part 2 connected the problem to an effective solution. In this article, we review the proper elements of Benefit Analysis. Although the elements of this review are very basic, they allow us to streamline the process and generate a simple, economic screening tool to more accurately show the true benefit. The thoughts and ideas presented are designed to assist you in working through the process of Conformance Engineering, and we hope they will be a catalyst for further discussion.