Scrum Master Toolbox Podcast: Agile storytelling from the trenches The Sprint Planning That Wouldn't End - A Timeboxing Failure | Alex Sloley
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"Although I knew about the steps of sprint planning, what I didn't really understand was the box of time versus the box of scope." - Alex Sloley
Alex shares a critical learning moment from his first team as a Scrum Master. After six months in the role, during an eight-hour sprint planning session for a four-week sprint, he successfully completed the "what" portion but ran out of time before addressing "how." Rather than respecting the timebox, Alex forced the team to continue planning for another four hours the next day—blowing the timebox by 50%. This experience taught him a fundamental lesson: the difference between scope-boxing and timeboxing. In waterfall, we try to control scope while time slips away. In Scrum, we fix time and let scope adjust. Alex emphasizes that timeboxing isn't just about keeping meetings short—it's about limiting work in process and maintaining focus. His practical tip: use visible timers to train yourself and your teams to respect timeboxes. This mindset shift from controlling scope to respecting time remains one of the most important lessons for Scrum Masters.
Self-reflection Question: How often do you prioritize completing a planned agenda over respecting the timebox? What message does this send to your team about the values you're reinforcing?
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About Alex Sloley
Alex believes that a great Scrum Master can have a long and lasting impact on people and teams. He is a global agile and product management evangelist, author of The Agile Community, and frequent international speaker. A former Microsoft leader with 15 years' experience, he now trains, coaches, and drives transformations worldwide. Certified across Scrum, ICAgile, and Kanban, Alex energizes communities, guides leaders, and—yes—enjoys good beer.
You can link with Alex Sloley on LinkedIn.