How does Sprint Health Gadget calculate Scope change?

The Sprint Health Gadget that was introduced in Greenhopper 6.2 displays a percentage value for scope change. How is this value calculated?

If I start a Sprint with 100 points, drop stories worth 20 p and add something else worth 20 p, what is my scope change percentage?

https://confluence.atlassian.com/display/GH/Using+the+Sprint+Health+Gadget

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Based on empirical testing, the value is just the number of points currently in Sprint scope versus number of points originally in the sprint scope.

So as an answer to my question, 100 p + 20 p - 20 p would result in a scope change of 0 %.

hmm, this is confusing me too.


We had 19 points at the start of our sprint, added 5 issues worth 5pts in total, and it is saying 53% scope change. How?

Are you certain that your board is set up to estimate in story points? Even if you're tracking story points, it might be configured for e.g. issue count.

Definitely. We have 6 teams that have been using agile boards for 4 months. Generally the calculations seem ok, but this is definitely wrong.

I think it's a combination of adding/removing things from sprints, changing story points, is causing something to go wrong somewhere.

There's also a problem with the velocity vs sprin/burndown report calculations.

https://answers.atlassian.com/questions/131984/sprint-report-does-not-match-velocity-chart-bug?page=1#comment-310075

I wish someone from Atlassian could give a definitive answer as to how these calculations should work - it would then be a lot easier to work out what's wgoing wrong.

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