Six weeks before our product launch, the VP of Marketing walked into my office with what she called "a small request." She wanted to add a complete user onboarding flow to our mobile app. Small request. Right. I'd seen this movie before. In my early days as a project manager, I would have smiled, nodded, and quietly absorbed the extra work into our timeline. The team would have worked nights and weekends, quality would have suffered, and I would have spent the launch week putting out fires instead of celebrating a successful delivery. But I'd learned the hard way that scope changes, no matter how they're dressed up, follow the laws of physics. You can't create time and resources out of thin air. The first thing I did was assess the real impact. This wasn't just adding a few screens. The onboarding flow required new API endpoints, database changes, additional testing scenarios, and integration with our analytics platform. My rough estimate put it at three w...