You have just been assigned to a software development project that was abandoned by the previous project manager. The bulk of the project work is complete, and the project is currently in its testing phase. While you review the project work products to gain an understanding of the project's requirements and design, you discover a major flaw in the technical design of the software application. The flaw would materialize into a failure only if the user executes certain uncommon actions or scenarios. However, if it occurs, the flaw would be critical and severely affect the application. The project has been going on well so far, and the customer has been pleased with its progress. The customer has scheduled a global launch of the software application soon. You realize that any impact to the schedule at this stage would disrupt the global launch. What should you do first in this situation