Sizing Your Stories

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Notes on slide 1

No crying. We’ll see what’s out there, and determine that story points is the “one true way”
The goal is to quickly come to a consensus
How do teams make decisions?

Vote using a show of hands: for/against
Can miss potential alternatives

Thumbs up, down, sideways (unsure)
Convince the sideways thumbs

Do you show support or resistance?
More fingers = more support or more resistance

Ultimately we need to know how big the task is so we can get to how long
That’s where size comes in

In what language?
Skill level?

Express the amount of business functionality an information system provides to a user

Tall, grande, venti
Small, medium, large
Not consistent

S, M, L, XL, XXL
Size = # of days
Wear a larger size, don’t remember the feel of the previous

Can’t be that precise
Accuracy versus precision

Created by Mike Cohn
Fun, easy, and fast
Uses a defined sequence of numbers

How do we get from here?

How do we determine how long?
What people really want to know

Story points measure size, risk, “bigness”

Estimate the number of sprints

Triangulate the stories: assign a 1 and a 13
Compare all stories to these
Group all like ones together and compare

When trying to decide between a 3 and 5, think buckets of water

Break them down if you need to

Play the game

Tips: watch out for anchoring (putting a number into the team’s heads)

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Sizing Your Stories - Presentation Transcript

SiZinG Your Stories Collaborative ways of estimating
Robert Dempsey ( I do lot’s of stuﬀ)
There is no crying in Agile
simple agreement
thumbing it
st of ve
how big?
lines of code
function points
coﬀee sizing
t-shirt sizing
Hours are... problematic
planning poker
?
0
1/2
1
2
3
5
8
13
20
40
100
how big?
how long?
Estimate size Derive duration
story points = # of sprints velocity
let’s play!
estimate this 1. As a Site Visitor, I can search for a product. 2. As a Site Visitor, I can add a product to my cart. 3. As a Site Visitor, I can remove a product from my cart. 4. As an Administrator, I can manage products. 5. As an Administrator, I can view a sales report by date. 6. As a Site Visitor, I can create an account. 7. As a User, I can purchase the products in my cart with a cc. 8. As a User, I can view my order history.
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