1. Waterfall and Agile Quality Techniques
Latha Karri
EECS 814
December 9th, 2009

2. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

3. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

4. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

5. Agile Methods Agility defined:
“marked by ready ability to move with quick easy grace”
“having a quick resourceful and adaptable character”
Emphasis on flexibility in producing software quickly and capably
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6. Agile Methods (continued)
Agile manifesto
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Source:

7. Examples of Agile Methods
Extreme Programming
Scrum
Adaptive Software Development
Lean Development
Evolutionary Project Management
Unified Process
Crystal
Dynamic System Development Method
Feature Driven Development
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8. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

9. XP- What is Extreme About It?
If code review is good, we’ll review code all the time -Pair programming
If testing is good, every body will test all the time -Unit testing by developers, functional testing by customers
If simplicity is good, we’ll make it part of the system with simplest design that supports its current functionality – Simple design
If short iterations are good, we’ll make the iterations really, really short - Small iterations and the planning game
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10. XP- What is Extreme About It? (continued)
If integration testing is important, then we’ll integrate and test several times a day – Continuous integration
If design is good, we’ll make it part of everybody’s daily business –Refactoring
If architecture is important, everybody will work defining and refining the architecture all the time - Metaphor
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11. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

12. Agile Methods: Twelve Facets of XP
The Planning Game (customer defines value)
Small Release
Writing Tests First
On-site Customer
Pair Programming
Sustainable Pace (40 hours/week)
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13. Agile Methods: Twelve Facets of XP (continued)
Collective Ownership
Continuous Integration (small increments)
Simple Design
Coding Standard
Metaphor (common vision, common names)
Refactoring
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14. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

15. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

16. Waterfall – Quality Techniques
Below screenshot displays the quality techniques employed by waterfall model
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Source: Completed Waterfall Process Model (Huo et al. 2004)

17. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

18. Agile – XP Quality Techniques
On-site Customer
real, live user on the team, available full-time to answer questions
reduces the amount of hard copy documentation
and the high cost associated with its creation and maintenance
reduces the delay in response time
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19. Agile – XP Quality Techniques (continued)
Pair Programming
two programmers continuously working on the same code -widely recognized as continuous code inspection
improves design quality
reduces defects
helps to learn from other person
coding becomes funs
resolution time for some critical problems is much faster
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20. Agile – XP Quality Techniques (continued)
Pair Programming
Source: Costs and Benefits of Pair Programming by Cockburn & Williams
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21. Agile – XP Quality Techniques (continued)
Continuous Integration
integrate and build the system several times a day, every time a talk is completed.
reduces compatibility issues
reduces time in finding the bugs
reduces the risk and helps you understand what works and what does not work early on
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22. Agile – XP Quality Techniques (continued)
Test Driven Development
programmers write tests first based on user stories (requirements)
reduces defects
helps to ensure that the application is written for testability
improves design quality
ensures that tests for every feature will be written
gives confidence to the developers
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23. Agile – XP Quality Techniques (continued)
Sustainable Pace \ 40 hr work week
programmers work hr per week
helps to produce high quality code in less time
helps the programmers to be healthy and happy
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24. Outline Agile Methodology Waterfall – Quality Techniques
XP- What is Extreme About It?
Agile Methods: Twelve Facets of XP
Waterfall – Quality Techniques
Agile – Quality Techniques
Summary
9/17/2018

25. Summary
Agile methods generally promote a disciplined project management process that encourages frequent inspection and breaks tasks into small increments with minimal planning
XP took common practices to the an extreme level by doing them more frequently
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26. Summary (continued)
Moving forward, we discussed the quality aspects of waterfall model
Finally, concluded with the agile quality techniques as addressed by test driven development, on-site customer, continuous integration, pair programming and sustainable pace
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27. References
Huo, M., Verner, J., Zhu, L., & Babar, M. A. (2004), “Software Quality and Agile Methods”, Proceedings of the 28th IEEE Annual International Computer Software and Applications Conference, pp Washington, DC
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28. References (continued)
Discipline vs Agility report by Jason Cradit
> Pros
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29. Questions ?