Project Management What is the 50-90 rule? January 30, 2026 by pups | Leave a Comment The 50-90 rule is a project management principle suggesting that a task, which seems 90% complete, often requires as much effort to finish as it took to reach that point. This rule highlights the tendency to underestimate the final stages of a project, emphasizing the importance of thorough planning and realistic timelines. What is the […] Read more »