Many clients ask me if they should bring a product owner to their daily stand-ups. My answer is no . . . and yes.
No, the product owner is not part of the daily stand-up
During the planning event the team makes a commitment for the sprint ahead, and it inspects the results during the sprint review. Similarly, the daily stand-up is about the self-organized team making a commitment for the day and inspecting the results from the previous day.
According to the Scrum Guide, "The Scrum Master enforces the rule that only Development Team members participate in the Daily Scrum."1
Mike Cohn also states, "The Daily Scrum meeting is not used as a problem-solving or issue resolution meeting."2
Having a product owner in the room invites a discussion that could easily cause the stand-up to extend beyond its allotted 15 minutes. Once a technical discussion begins, it is the ScrumMaster's job to wrap it up and make it a "parking lot" issue.
Yes, invite the product owner immediately after a daily stand-up
Often a mature team finishes a daily stand-up with a number of open "parking lot" issues. "Issues that are raised are taken offline and usually dealt with by the relevant subgroup immediately after the meeting."2
These could be purely technical issues as well as functional issues; the latter requires the product owner’s input. Though in general a team should be mindful of people's time and limit participants of the discussion to those who are directly interested and can contribute, it is important to have a product owner present to be a part of this discussion. Moreover, not having a product owner immediately available to help resolve functional issues can become an impediment. Avoid the anti-pattern of limited availability of the product owner.
I'd recommend that a product owner block 30 minutes to one hour on the calendar during a team stand-up, and stay at their desk doing normal activities. After a team is done with a stand-up and moves over the parking lot issues, they can invite the product owner to join them if necessary, using one of many modern communication channels, such as phone, instant messaging, or whatever they agree on. In this way, neither the team members nor the product owner wastes any time.
1. "The Scrum Guide," Scrumguides.org, accessed March 31, 2017, http://www.scrumguides.org/scrum-guide.html.
2. "Daily Scrum Meeting," Mountain Goat Software, accessed March 31, 2017, https://www.mountaingoatsoftware.com/agile/scrum/meetings/daily-scrum.