I am totally new to Agile methodology and learning it. I have seen lots of tutorials and videos and they've all been very helpful. However, I have one unanswered question from my existing study. The situation is:
In the beginning, there were a total of 100 story points. As part of Sprint 1, 10 were completed. 90 points were still remaining but 10 additional points were added. This makes, again, 100 story points in total.
In sprint 2, 20 story points were completed but none were added, so total points became 80.
In Sprint 3, 15 story points were completed. Total story points come down to 65. The cycle goes on. By the burndown chart, we can estimate some values like:-
Team's average velocity is 15.
In 8 sprints total, 120 story points will be covered.
To complete the work it will take around 7 sprints.
- Product Backlog changing rate (My answer is 65 but I am not sure)
If someone can answer this and explain the way to calculate that, it will be very helpful.