Sizing & Estimating User Stories by Rally for the …files.meetup.com/6818372/Sizing & Estimating...
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Story Estimation Presented by Thom Gray & Mark Kilby February 2014
Transcript of Sizing & Estimating User Stories by Rally for the …files.meetup.com/6818372/Sizing & Estimating...
Story Estimation Presented by Thom Gray & Mark Kilby February 2014
Welcome to Carnival!
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ishop
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Rally Software is a leading global provider of cloud-based solutions for managing Agile software development. The Rally® Agile application lifecycle management (ALM) platform transforms the way organizations manage the software development lifecycle by closely aligning software development and strategic business objectives, facilitating collaboration, increasing transparency and automating manual processes. Companies use Rally to accelerate the pace of innovation, improve productivity and more effectively adapt to rapidly changing customer needs and competitive dynamics.
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Our Speakers
Thom Gray CSM, CSP, SAFe
Mark Kilby CSM, Agile Coaching,
SAFe
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Go Agile. Go Rally.
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STORIES USER
getting to know you INTROS
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Mark Kilby
Enterprise Agile Coach
@mkilby– twitter
http://markkilby.com
Software since 1990 Agile Coaching since 2003
AgileOrlando.com (founder)
Lean Coffee Orlando (founder)
speaker
getting the most of our time WORKING AGREEMENTS
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WHAT is a User Story?
STORIES USER
CONVERSATION
CARD
CONFIRMATION
CONVERSATION
CARD
CONFIRMATION
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AS A <type of user>, I WANT TO <goal>, SO THAT <reason>.
CONVERSATION
CARD
CONFIRMATION
I want the toast to pop up when it’s done.
That’s really expensive. The popping part is easy – that’s just a spring. But knowing when the toast is done requires an optical sensor – new technology.
But what about all the other toasters out there?
Oh, they use a timer. They don’t really know when the toast is done.
Our customers don’t want a super toaster. They just want a regular toaster, with a timer, like everyone else.
Oh, that won’t be expensive at all. That’s easy.
Cool.
CONVERSATION
CARD
CONFIRMATION
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Acceptance criteria are…
criteria for acceptance clarification of the story guide for automated
acceptance tests documentation
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can take multiple forms • Bulleted or numbered lists • Scenario • Links to other documents • What else?
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As a WSAPI user I want to be able to invoke the delete method on a recycle bin entry so that it goes away. Acceptance Criteria * Only Workspace admins can delete
forever * No revisions generated * No notifications sent * item no longer appears in the recycle
bin or the app or in WSAPI * items not found in searches
bullets
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Scenario = Persona + Task + Environment
Story: Account Holder withdraws cash As an Account Holder I want to withdraw cash from an ATM So that I can get money when the bank is closed Scenario 1: Account has sufficient funds Given the account balance is $100 And the card is valid And the machine contains enough money When the Account Holder requests $20 Then the ATM should dispense $20 And the account balance should be $80 And the card should be returned
http://dannorth.net/whats-in-a-story
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Scenario = Persona + Task + Environment Scenario 2: Account has insufficient funds Given the account balance is $10 And the card is valid And the machine contains enough money When the Account Holder requests $20 Then the ATM should not dispense any money And the ATM should say there are insufficient funds And the account balance should be $10 And the card should be returned Scenario 3: Card has been disabled Given the card is disabled When the Account Holder requests $20 Then the ATM should retain the card And the ATM should say the card has been retained
http://dannorth.net/whats-in-a-story
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AS A DOG, I WANT TO BE ABLE TO ORDER FOOD ONLINE, SO THAT I DON’T HAVE TO RELY ON PEOPLE ANYMORE.
problem (what) versus solution (how) What
How
via the web?
through an installed app?
using the telephone?
by telepathy?
Independent Negotiable
Valuable Estimable
Sized appropriately Testable
QUALITIES USER STORY
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GUI
Business Logic
Database
Story 1 Story 2 SLICES VERTICAL
writing user stories EXERCISE
As your wife, I need
the shoe molding
installed so that the
tile looks finished.
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WHY do we Estimate User
Stories?
STORIES USER
Goal%
Feature%
User%Story%
Feature% Feature% Feature%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
Features%are%decomposed%into%User%Stories%that%are%thin%slices%of%value%added%into%the%system%
If our backlog looks like this, the first question is…
Goal%
Feature%
User%Story%
Feature% Feature% Feature%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
User%Story%
Features%are%decomposed%into%User%Stories%that%are%thin%slices%of%value%added%into%the%system%
“How long will this take?”
If we know “how big”…
If we know “how big”…
We can calculate “how long” to done
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HOW do we Estimate User
Stories?
STORIES USER
How big is Neptune?
We are better at relative than absolute
estimates
the perils of absolute estimation EXERCISE
As your facilitator, I
need you to walk from
here to there.
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POINTS STORY
Complexity Effort Doubt
Doubt
Complexity
Complexity
Complexity Effort
Effort
Effort Doubt
Doubt
Story 1
Story 2
Story 3
Doubt
Complexity Effort
Complexity
Effort
Doubt
Complexity Effort
Doubt
Story 1
Story 2
Story 3
Doubt
Complexity Effort
Complexity
Effort
Doubt
Complexity Effort
Doubt
Story 1
Story 2
Story 3
M
M
L
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1""2""3""5""8""13"
20""40""100"
Sequence Fibonacci
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POINTS ESTIMATING SIZE
1""2""3""5""8""13"20"40"100"S! M! L! XL!
S!
S!
M!
M!
L!
L!
XL!
XL!
Doubt
Complexity Effort
Complexity
Effort
Doubt
Complexity Effort
Doubt
Story 1
Story 2
Story 3
5
5
13
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HOW do we Size User Stories?
STORIES USER
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POKER PLANNING
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Read user story, discuss briefly Each team member selects estimate card Cards all turned over at once Discuss difference and outliers Re-estimate until estimates converge
POKER PLANNING
planning poker EXERCISE
As your wife, I need
the shoe molding
installed so that the
tile looks finished.
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ESTIMATE BY ANALOGY
“This story is like that story, so it’s estimate is what that story’s estimate was.”
estimate by analogy EXERCISE
As your wife, I need
the shoe molding
installed so that the
tile looks finished.
SMALL
LARGE
MEDIUM SMALL SMALL
MEDIUM
MEDIUM
LARGE
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Questions?
STORIES USER
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STORIES USER
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