Why does setting Start Date for a Release change the predicted Completion Date?

I'm using the Version Report to forecast a predicted completion date and I'm not very confident in what I'm seeing so far.  I noticed that changing the Release Start date changes the predicted completion date even if the total amount of work remains the same. I also notice that the Completed Story Points value is unchanged when I adjust the Start date.

My reason for setting the Start date earlier is that it reflects when work actually began.  However, I don't see Completed Story Points for that work even though the items in question are showing up in the set of Completed Issues shown further down in the Version Report.  My concern is that the calculated velocity seems like it's including a large period of zero velocity and this reduces the overall velocity rate to predict a much later release date.  If I leave the Start date empty (it's optional), The predicted release date is much sooner.  Considering the high-stakes nature of reporting a predicted release date, I really need to understand how this works. :-)


1 answer

0 votes

I guess the linear regression then is done only from start date.

How do you change the start date?

Suggest an answer

Log in or Join to answer
Community showcase
Sarah Schuster
Posted Jan 29, 2018 in Jira

What are common themes you've seen across successful & failed Jira Software implementations?

Hey everyone! My name is Sarah Schuster, and I'm a Customer Success Manager in Atlassian specializing in Jira Software Cloud. Over the next few weeks I will be posting discussion topics (8 total) to ...

2,802 views 11 18
Join discussion

Atlassian User Groups

Connect with like-minded Atlassian users at free events near you!

Find a group

Connect with like-minded Atlassian users at free events near you!

Find my local user group

Unfortunately there are no AUG chapters near you at the moment.

Start an AUG

You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs

Groups near you
Atlassian Team Tour

Join us on the Team Tour

We're bringing product updates and pro tips on teamwork to ten cities around the world.

Save your spot