agile - Velocity Chart in Rally -


i working on project pull out data rally , create velocity chart.

i understand rest web service apis use defects, iteration, hierarchical requirement , iteration cumulative flow data.

how calculations done calculate velocity per iteration particular project?

what data required , how can achieved? right i'm able pull plan estimate of accepted user stories , total plan estimate.

i wrote app calculate velocity. used story points of accepted stories/defects in time period (iteration/release). numbers ended matching rally had velocity, believe takes.


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