A delivery manager who is not on the Scrum Team tells the Scrum Master to cut the Sprint Retrospective on one-month Sprints from three hours to forty-five minutes, "because three hours of talking is waste". The team in fact usually finishes in about ninety minutes. Who decides how long the event runs?

Professional Scrum Master I, objective 2. Developing people and teams medium

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The options

Not correct The delivery manager, since the organisation pays for the time and may set the limits it can afford

Wrong. The Scrum Team is structured and empowered by the organisation to manage its own work; setting the length of its inspection events from outside is exactly the empowerment Scrum requires the organisation to give up.

Correct The Scrum Team, which ends the event once its purpose is met

Correct. The Scrum Team is self-managing — it internally decides who does what, when and how — so how it spends the time inside the timebox is its own call. Three hours is a ceiling, not a booking to defend or a length to impose, and ninety minutes that improve the next Sprint is a successful Retrospective.

Not correct The Scrum Master, who owns the events and therefore sets their duration

Wrong, and it is the most tempting one because the Scrum Master does serve the events. The service is ensuring they happen, are positive and productive and stay within the timebox — not owning them or deciding the agenda's length.

Not correct Nobody — the three hours are fixed and the team must use them all

Wrong. Treating a maximum as a mandatory duration is the same mistake as ignoring it, and it teaches the organisation that Scrum is a set of meetings to sit through.

Why

Two different people are wrong here in opposite directions, which is why the item is worth sitting with: the manager is shortening an event he does not own, and a Scrum Master who simply overrules him has claimed the same ownership from the other side. A self-managing team decides how it spends the time inside a timebox. The Scrum Master's job is to keep the ceiling honest and to make the event productive enough that nobody outside wants to shorten it.

Where this comes from

Cited
Scrum Guide section Scrum Team
What it says
They are also self-managing, meaning they internally decide who does what, when, and how.

Practise this

Reading one question is not practice. The trainer will draw a set from objective 2 and space the ones you get wrong.

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