During which phase of DMAIC define measure analyze improve control is the sole purpose to demonstrate with fact and data that your solutions solve the problem?

The phase in DMAIC where the sole purpose is to demonstrate with facts and data that your solutions solve the problem is the "Improve" phase. In this phase, solutions are implemented, and their effectiveness is validated through data analysis. The focus is on ensuring that the changes made lead to the desired outcomes and address the root causes identified in the earlier phases.