Practical story sizing
This presentation is the property of its rightful owner.
Sponsored Links
1 / 20

Practical Story Sizing PowerPoint PPT Presentation


  • 106 Views
  • Uploaded on
  • Presentation posted in: General

Practical Story Sizing. Brett Maytom Senior Consultant, Readify Vic .NET – 13 Aug 2011. Talk Backlog. What is size Relative Size Sizing Scales Velocity Story Size versus Task Sizing Running Sizing Meetings Questions. What is size?. Unit of measure for work. Why Relative Sizing.

Download Presentation

Practical Story Sizing

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Practical story sizing

Practical Story Sizing

Brett Maytom

Senior Consultant, Readify

Vic .NET – 13 Aug 2011


Talk backlog

Talk Backlog

  • What is size

  • Relative Size

  • Sizing Scales

  • Velocity

  • Story Size versus Task Sizing

  • Running Sizing Meetings

  • Questions


What is size

What is size?

  • Unit of measure for work


Why relative sizing

Why Relative Sizing

  • Your Time IS NOT My Time


Size does not

Size does not …

  • indicate time

  • Indicate skill

  • include risk

  • change over time

  • Increase\decrease with proficiency


Relative

Relative

Four Times

Equal

Double

Half

Three Times


It s relative

It’s relative


Sizing scales

Sizing Scales

  • Fibonacci

    1 2 3 5 8 13 21 34

  • Modified Fibonacci

    1 2 3 5 8 13 20 50 100

  • Binary

    1 2 4 8 16 32 64 128

  • T-Shirt


Other symbols

Other Symbols

  • 0 (Zero)

    “Too small and not worth sizing”

  • ?

    “I have no idea what you are talking about”

  • ∞ (Infinity)

    “This is way too big”


Velocity

Velocity

  • Rate of work of team“Team can complete X story points per sprint”

  • Not individual

  • Full team including BA, QA, Dev., Test, Architect, Scrum Master

  • Improves with time


Story sizing

Story Sizing

  • Uses a relative sizing scale

  • Not done at iteration planning

  • Used for Release Planning


Stories and tasks

Stories and Tasks


Task sizing

Task Sizing

  • Tasks defined in sprint planning

  • Sized in hours

  • Updated daily with remaining hours

  • Used for sprint burndown

  • Cross-check against Story Size using current velocity


Sizing in multi team

Sizing in multi-team

  • Consistent story size critical

  • Large scope differences

  • Clear benchmarks

  • Central team


How to play planning poker

How to play Planning Poker

  • Product owner presents a story

    • Team clarify by asking questions

    • “1 … 2 … 3 … show”

    • Smallest and largest values explain

    • Repeat until consensus reached


Spikes

Spikes

  • Totally new technology

  • Never done before

  • Have no idea how to size work

  • Time-boxed to a few days


Acid test

Acid Test

A story sized in the first sprint should have the same size in later sprints


Practical tips

Practical Tips

  • Use relative sizes for stories

  • Do not factor in effort, risk and time

  • Build a list of benchmark stories

  • Continually inspect that “time” is not introduced story

  • Differentiate between Task and Story sizes

  • Your Time IS NOT My Time


Thank you

Thank you

Brett Maytom

[email protected]@brettmaytom

http://brett.maytom.net


  • Login