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Deal with velocity BEFORE you break into iterations
A lot of this pain could actually have been avoided if you’d applied velocity at the
beginning of your project. By applying velocity up front, you can calculate how many
days of work you and your team can produce in each iteration. Then you’ll know exactly
what you can really deliver in Milestone 1.0.
First, apply your team velocity to each iteration
By taking the number of people in your team, multiplied by the number of actual working
days in your iteration, multiplied finally by your team’s velocity, you can calculate how
many days of actual work your team can produce in one iteration:
3 x 20 x 0.7 = 42
The amount of work, in
The number of
people on your team.
20 working days in
your iteration
Your team’s first
pass velocity.
Add your iterations up to get a total milestone estimate
Now you should estimate the number of iterations you need for your milestone. Just
multiply your days of work per iteration by the number of iterations, and you’ve got the
number of working days you can devote to user stories for your milestone:
42 x 3 = 126
Number of
iterations in
Milestone 1.0.
Q: That sucks! So I only have 14 days of actual productive
work per iteration if my velocity is 0.7?
A: 0.7 is a conservative estimate for when you have new members
of your team coming up to speed and other overheads. As you and
your team complete your iterations, you’ll keep coming back to that
velocity value and updating it to reflect how productive you really are.
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project planning
person-days, that your team
can handle in one iteration.
Amount of work in days that
you and your team can do before
Milestone 1.0 needs to be shipped.
Q: With velocity, my Milestone 1.0 is now going to take 79
working days, which means 114 calendar days. That’s much
more than the 90-day/3-month deadline that Orion’s Orbits set,
isn’t that too long?
A: Yes! Orion’s Orbits need Milestone 1.0 in 90 calendar days, so
by applying velocity, you’ve now got too much work to do to meet that
deadline. You need to reassess your plan to see what you really can
do with the time and team that you have.
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