® ibm software group © 2007 ibm corporation agile software development: what’s really going on...
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®
IBM Software Group
© 2007 IBM Corporation
Agile Software Development: What’s Really Going On
Scott W. AmblerPractice Leader Agile Development
IBM Software Group | Rational software
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Scott Ambler - Background
Practice Leader Agile Development
Fellow – International Association of Software Architects
www-306.ibm.com/software/rational/bios/ambler.html
IBM Software Group | Rational software
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Presentation Overview
Warning!
Agile Software Development (ASD)
Agile Adoption Rates
Going Beyond the Extreme Rhetoric
IBM Software Group | Rational software
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Warning!
I’m spectacularly blunt at times
Many new ideas will be presented
Some may not fit well into your existing environment
Some will challenge your existing notions about software development
Some will confirm your unvoiced suspicions
Don’t make any “career-ending moves”
Be skeptical but open minded
®
IBM Software Group
© 2007 IBM Corporation
Agile Software Development (ASD)
What is ASD?
How it’s different
Mythbusters
Why does ASD Work?
Some Common Practices
IBM Software Group | Rational software
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What is Agile? An iterative and incremental (evolutionary)
approach performed in a highly collaborative manner with just the right amount of ceremony to produce high quality software in a cost effective and timely manner which meets thechanging needs of its stakeholders.
Core principles “Fits just right” processContinuous testing and validationConsistent team collaborationRapid response to changeOngoing customer involvementFrequent delivery of working software
IBM Software Group | Rational software
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How Agile is Different
Focus on collaboration: Less paperwork and more conversation
Stakeholders actively involved
Focus on working software: Greater feedback makes agile projects easier to manage
Less documentation is required
Less bureaucracy
Agilists are generalizing specialists: Less hand offs between people
Less people required
Specialists find it difficult at first to fit into the team
Agile is based on practice, not theory: This is a significant change from traditional
You need to see how agile works in practice to truly understand it
IBM Software Group | Rational software
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Mythbusters
Myth
1. No Documentation
2. Undisciplined
3. No Planning
4. Not Predictable
5. Does Not Scale
6. Is a Fad
7. Silver Bullet
8. RUP isn’t agile
9. Not Fixed Price
Reality
1. Agile Documentation
2. Requires great discipline
3. Just-in-time (JIT) planning
4. Far more predictable
5. Eclipse is agile
6. It’s quickly becoming the norm
7. It requires skilled people
8. RUP is as agile as you make it
9. Agile provides stakeholders control over the budget, schedule, and scope
IBM Software Group | Rational software
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Why Agile Workswww.ambysoft.com/essays/whyAgileWorksFeedback.htm
IBM Software Group | Rational software
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Some Common Practices
Regular Deployment of Working SoftwarePair ProgrammingRefactoringContinuous IntegrationTest Driven Development (TDD)Shared Code OwnershipActive Stakeholder Participation
®
IBM Software Group
© 2007 IBM Corporation
Agile Adoption Rates*
Have you Adopted Agile?
Number of Projects Run
Success Rates
*Figures from an April 2007 Survey to be summarized in the August 2007 issue of Dr. Dobb’s Journal
IBM Software Group | Rational software
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Has Your Organization Adopted One or More Agile Techniques?
Yes69%
No31%
IBM Software Group | Rational software
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Number of Agile Projects Run
64
194
82
30
57
1
2 to 5
5 to 10
10 to 20
20+
IBM Software Group | Rational software
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% of Successful Agile Projects
44%
33%
12%
5% 6%
90%+ 75-90% 50-74% 25-49% >25%
®
IBM Software Group
© 2007 IBM Corporation
Going Beyond the Extreme RhetoricModeling and Documentation
Rational Unified Process (RUP)
Testing
Database Refactoring
Database Regression Testing
Governance
IBM Software Group | Rational software
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Agile Model Driven Development (AMDD) Project Level www.agilemodeling.com/essays/amdd.htm
IBM Software Group | Rational software
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Agile Documentation
Document the stable, not the speculative
Agile documents:Maximize stakeholder ROI
Describe “good things to know”
Have a specific customer and facilitate the work efforts of that customer
Are sufficiently accurate, consistent, and detailed
IBM Software Group | Rational software
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Rational Unified Process (RUP)
IBM Software Group | Rational software
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Agile Testingwww.ddj.com/dept/debug/196603549?cid=Ambysoft
Regression testing is critical to the success of evolutionary (iterative and incremental) development
Acceptance tests are considered to be primary requirements artifacts
Unit tests are considered to be detailed design artifacts
IBM Software Group | Rational software
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Database Refactoring
A database refactoring is a simple change to a database schema that improves its design while retaining both its behavioral and informational semantics. Examples: Move Column, Rename Table, and Replace Blob With Table.
A database schema includes both structural aspects such as table and view definitions as well as functional aspects such as stored procedures and triggers.
Important: Database refactorings are a subset of schema transformations, but they do not add functionality.
www.agiledata.org
IBM Software Group | Rational software
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Database Testingwww.agiledata.org/essays/databaseTesting.html
IBM Software Group | Rational software
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Organization& Meetings
Roles &Responsibilities
Processes
Measures
Policies &Standards
Mission & Principles
Agility at Scale: “Right-Sizing” Governance
Pragmatic Governance Body
Staged Program Delivery
Simple And Relevant Metrics
Continuous Project Monitoring
Iterative Development
Adapt The Process
Risk-Based Milestones
Continuous Improvement
Embedded Compliance
Manage Project Pipeline By Business Value
Scenario-Driven Development
Self-Organizing Teams
Align HR Policies With IT Values
Align Organization Structure With Architecture
Integrated Lifecycle Environment
Valued Corporate Assets
Flexible Architectures
®
IBM Software Group
© 2007 IBM Corporation
Keep In Touch!
Scott W. Amblerwww-306.ibm.com/software/rational/bios/ambler.html
IBM Software Group | Rational software
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References and Recommended Reading www.agilealliance.com www.agilemodeling.com www.agiledata.org www.ambysoft.com www.databaserefactoring.com www.enterpriseunifiedprocess.com Ambler, S.W. (2002). Agile Modeling: Effective Practices for XP and the UP.
New York: John Wiley & Sons. Ambler, S.W. (2003). Agile Database Techniques. New York: John Wiley &
Sons. Ambler, S.W. (2004). The Object Primer 3rd Edition: AMDD with UML 2. New
York: Cambridge University Press. Ambler, S.W. and Sadalage, P.J. (2006). Refactoring Databases: Evolutionary
Database Design. Reading, MA: Addison Wesley Longman, Inc. Larman, C. (2004). Agile and Iterative Development: A Manager’s Guide.
Reading, MA: Addison Wesley McGovern, J., Ambler, S.W., Stevens, M., Linn, J., Sharan, V., & Jo, E. (2003).
The Practical Guide to Enterprise Architecture. Prentice Hall PTR.
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