When managers plan the desired results are?

Projects delivered to scope (including quality), within the timescale and within the anticipated cost. Reality is somewhat different when Customers either do not define the exact specification/end state (sometimes deliberately) or request changes after the start of the project, unexpected events may happen that will require mitigations, timescales may be reduced (especially if your Customer has Customers), or changes are required with no increase in costs (so trade-offs etc may be required). The final unofficial desired result is to manage change throughout the project and at the same time delight your Customer and Stakeholders. This all goes to show how difficult some projects can be to manage, and why there is no set formula for guaranteed results each time.