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RTC Timeline

What is the downside of having only one current iteration selectable in RTC when multiple releases are under a single timeline ?
Thanks !
Accepted answer

the question is, are all the teams supposed to be running the same rhythm and release/milestone iteration structure at the same time? If that is the case, you can run on just one timeline.
If the teams are working on different products and milestones and the start and end dates of the releases and milestones are not the same, you would create several timelines, one for each temporal structure. With just one timeline you would not be able to express different rhythms. For example, if you have teams that run weekly sprints and others want to run bi weekly sprints. Or if some teams want to have a milestone per 4 weeks and others rather one per 6 weeks. Separate timelines would give you that flexibility.
The advantage of having just one timeline would be less administrative overhead.
I would be not that concerned at this point. You can start with one timeline and if you see needs changing over time, you can add timelines and move teams to them.
Comments

Also, I would recommend starting with one timeline, and only introduce an additional timeline if there are important reasons do to so. Having each team work on a similar rhythm usually helps simplify communication and synchronization between teams.

Hi Ralph,

Why should someone in one team not be able to see the timeline of another team? That does not make sense to me.
There is a use case, where in the drop down list it makes sense to only show iterations of the timeline related to the team the work item is filed against. This is being considered. However, it is also not trivial. What to show if it is not filed against a team and so forth?

Thanks Ralph, I guess we are thinking differently about it.