A Product Owner says they will skip the Sprint Retrospective because it is about how the Developers work together, and a delivery manager asks to attend so they can hear the improvement ideas first-hand. Who takes part in the Sprint Retrospective?

Professional Scrum Master I, objective 1. Understanding and applying the Scrum framework easy

Machine-checked — no person has signed for it. This question was read against the source cited below by an automated pass, which found no contradiction. That is a weaker claim than it sounds: the same kind of process wrote the question, so it can confirm its own mistake.

Treat it as a good draft rather than as settled fact, and read the source below before you rely on it. It is not used in mock exams here — only questions a person has signed for are.

The options

Not correct The Developers alone, since the event inspects how they did the work

Wrong. The event inspects how the last Sprint went with regard to individuals, interactions, processes, tools and the Definition of Done — a scope that plainly includes how the Product Owner and the Developers worked together.

Not correct The Developers and the Scrum Master, with the Product Owner joining only when invited

Wrong, and it is the most plausible of the wrong answers because it describes what many teams actually do. There is no optional membership of a Scrum Team; a Product Owner who attends by invitation has been made a guest at their own team's event.

Correct The whole Scrum Team — one Scrum Master, one Product Owner and the Developers

Correct. Scrum names the Scrum Team as the party that inspects, and the Scrum Team is those three parts. Nobody in it opts out of the event that decides how the team will work next Sprint.

Not correct The whole Scrum Team plus the delivery manager, since improvements usually need management support

Wrong. Scrum names the Scrum Team as the party that inspects the Sprint and identifies the changes, and adds no one to that event. Improvements needing organisational help are carried outward afterwards by the Scrum Master, who serves the organisation as well as the team.

Why

Every Scrum event is an event of the Scrum Team, and the Scrum Team is one Scrum Master, one Product Owner and Developers — with the Daily Scrum the single exception, being for the Developers. That one distinction answers most attendance questions on this paper. The Retrospective in particular needs the Product Owner present, because a great deal of what a team wants to improve is the collaboration between them and the person ordering the work.

Where this comes from

Cited
Scrum Guide section Scrum Team
What it says
The Scrum Team consists of one Scrum Master, one Product Owner, and Developers.

Practise this

Reading one question is not practice. The trainer will draw a set from objective 1 and space the ones you get wrong.

Practise Professional Scrum Master I

More questions on this objective

All questions on Understanding and applying the Scrum framework