Agile Development : Scrum & Kanban

Introduction

Sai Li @ Yowoo Tech. 2016/02/15 2017/03/29

Agenda• Software Development

• What is Agile?

• Scrum

• Kansan

• Comparison

Software Dev. Life Cycle

• Requirement

• Implementation

• Deployment

Software Dev.• Waterfall• Agile

• Extreme Programming • Scrum • Kanban • …

Waterfall

300+ …

Waterfall Problems• Very long iteration

• Delay

• Too much time for useless features

• Uncertain Progressco

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Agile Dev. 1st Roundco

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Agile Dev. 2nd Roundco

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Agile Dev. 3rd Roundco

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Agile Dev. 4th Roundco

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Life’s too short to build something nobody wants

- Ash Maurya, <Running Lean>

needs(value)

Manifesto for Agile Software Development

Manifesto

principle

Agile Dev.

• Value Driven: WHAT to do ?

• Incremental

• Improve workflow, reduce waste

• Iterative

Waterfall vs. Agile

Time

Changing Cost

Waterfall

Agile

Waterfall vs. Agile

Agile

Waterfall

http://www.hemantlodha.com/wp-content/uploads/2014/11/image11.jpg

Incremental Development

http://herdingcats.typepad.com/.a/6a00d8341ca4d953ef01a511e114a3970c-pi

Agile Dev.

• It might take a while to unravel deep assumptions, but that unraveling may open the door to the next round of improvement. by Kent Beck

Scrum

What’s Scrum?

http://www.usctrojanrugby.org/wp-content/uploads/2014/01/byu-scrum.jpg

Scrum• Roles: Product Owner, Scrum Master, Team Members

• Time Boxing: 1 ~ 4 weeks release a viable product

• Cross-functional team

• Planning Meeting at the beginning

• Demo & Retrospective Meeting at the end

• Getting feedback every round

Product Owner

• Build the right thing

• Product spec

• Priority

• Take the responsibility

Scrum Master

• Build it faster

• Assistant, improve workflow

• Remove impedances

Team Members

• Build the things right

• cross-functional team

Scrum Flow

http://www.quotium.com/content/uploads/2014/06/060714_1811_Comparisono2.png

Sprint

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What is Story?

• End-to-end

• Value driven

• This app is written in Java

• This database will be build on AWS

What is Story?Template:

• As Someone, I can do something, so the value is…

Ex:

• As an User, I can view items in shop

• As an Administrator, I can edit users’ profile

• As an User, I can save items to cart

Story Card

• Goal

• Importance

• How to Demo

• Estimate

change password

How to demo

Importance

Points

30

20

Login

How to demo

Importance

Points

100

15

Planning Meeting1. PO explain Story, choose stories with highest priority

2. divide story in tasks, estimation

3. Communication confirmation compromise

4. What to do? How to do?

5. How to demo?

Output: Sprint Backlog

Choose Story

Estimation

change password

How to demo

Importance

Points

30

20

Estimation3 0 13

3 3 3

5

5

Daily Scrum Meeting• Fixed place, fixed < 15 mins

• Standing

1. Tasks Yesterday

2. Tasks Today

3. Any Impedance?

http://www.xqa.com.ar/visualmanagement/wp-content/uploads/standup2.jpg

Task BoardSprint #1 6/1 ~ 6/14

Burndown Chart transparent visualize tool

Sprint Review Meeting

Retrospective Meeting

Retrospective Meeting

• What worked well? • What can be improved? • Stop doing something • Suggestion

backlog refinement

Product backlog refinement meeting

• Grooming backlog

• Pick Stories

Scrum Myth

1. Scrum won’t solve problems

2. Scrum is not silver bullet

3. For Flexibility not speed

4. Conservation of Work

Kanban

Toyota Production System

Just in time

Toyota Production System

Toyota Production System

Push vs. Pull

Kanban Method1. Visualize

2. Limit Work In Progress (WIP)

3. Manage Flow

4. Make policies explicit

5. Implement feedback loops

6. Improve collaboratively, evolve experimentally

Visualize

Work In Progress(Process)

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Limit WIP

stop finishing, start finishing

prevent context switching

Manage Workflow

cycle time

lead time

Kansan Method

4. Make policies explicit

5. Implement feedback loops

6. Improve collaboratively, evolve experimentally

Comparison

Scrum Kanban

prescriptive >

role 3 0timeboxediteration V X

empirical O O

WIP

Change within an iteration

Backlog items

•

•

•

References•

• Kanban Roadmap • http://www.slideshare.net/ihower/scrum-kanban-scrum-lean-startup

Q & A