Estimation in Agile projects can be tricky sometimes, especially for teams and organizations that are moving into Agile from non-Agile frameworks
I use these slides, along with a small activity to train teams on estimation in Agile
A SMALL EXERCISE
Can you arrange these planets in order of their size?
HOW WERE YOU ABLE TO
Did you know their masses?
Did you know their diameters?
Did you know the history of these planets?
How then, were you able to arrange accurately?
Imagine you are getting a house built
You contact a contractor
You explain to him the how you want your new house to look like
You answer any queries that he has
Then, you ask for an __________
Can we have something called a good estimate?
How much can we trust our estimates?
Are estimates for real or just lies?
Are we giving estimates just because our SM will not agree if we
Lets look at a small video
The further into the project you go, the lesser the uncertainties
So, why estimate early?
Estimates are a means to trigger conversations
They bring out the wrong assumptions and wrong understandings
Provided only to get the project rolling
Estimation of Epics
Estimation of User Stories
Estimation of Tasks
ESTIMATION OF EPICS
Very high level
Large variance is expected
Is only a bucketing mechanism
Helps to differentiate some large epics v/s small epics
Helps to determine what needs to be considered now and what needs
to be considered later
Typical metrics used – T Shirt sizing
ESTIMATING USER STORIES
Little more detailed
More number of buckets
Clearer end goal
Lesser variance expected
Typical metrics – Story point sizing
Much lesser variance
Done at an individual task level where information is already known
Mostly done at a day level
Recommended metric – Hours or ideal days
HOW TO ESTIMATE
The exact number of candies in this jar can not be determined by
looking at it, because most of the candies are not visible. The amount
can be estimated by presuming that the portion of the jar that cannot
be seen contains an amount equivalent to the amount contained in the
same volume for the portion that can be seen.