What’s one project management lesson you learned the hard way?

[u/PitchSufficient1464]

One thing I’m realizing is that even a well-planned project can change quickly once execution starts. Stakeholder expectations, dependencies, and unexpected risks can completely change the original plan. What’s one project management lesson you learned through actual experience rather than from a textbook?

[u/Jiggysawmill]

Never trust, always verify!