agile development processes _ scrum for project management
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Agile Development 1
cs2340:Agile Development
Summer 2007
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Agile Development 2
In the beginning was….
• The Waterfall
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Agile Development 3
Software Development Life Cycles
• Conceptual Model– Waterfall, Evolutionary Prototyping, Spiral,
Staged Delivery, etc.
• Management of Risk
• Sequence of Activities
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Agile Development 4
Two Ways to Build a Pyramid(John Mayo-Smith)
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Agile Development 5
Thus was born Agile
• Individuals and Interactions – over process and tools
• Working software– over comprehensive documentation
• Customer Collaboration– over contract negotiation
• Responding to Change– over following a plan
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Agile Development 6
Iterative Delivery
• Project divided in pieces called iterations
• At end of iteration something is delivered
• No schedule slip (timeboxing)
• Each iteration nominally 4 weeks
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Agile Development 7
Some Agile Processes
• SCRUM
• Extreme Programming
• EVO
• RUP Dx
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Agile Development 8
SCRUM
• Focuses mainly on management of software products
• Timeboxed iterations called sprints
• Project planned through use of 2 spreadsheets (Product and Sprint)
• Daily Meeting (Pigs and Chickens)
• Each sprint ends with “ready” deliverable
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Agile Development 9
SCRUM
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Agile Development 10
Product Backlog
• Its not how many hours you work or project, its how many you have to go.
Task Initial Estimate
Adjust Factor
Adjust Estimate
1 2 3
Hide/Display burndown window 3 .2 3.6 3.6 3.6 0
Automatic recalculation of row/column values 3 .2 3.6 3.6 2.4 0
Display Product Burndown Graph 3 .2 3.6 3.6 0 0
Display Sprint Burndown Graph 4 .2 4.8 4.8 2.4 2.4
Total Remaining 650 0 650 650 550 320
Product backlog shows prioritized tasks, and hours to go by sprint
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Agile Development 11
Sprint BacklogTask Responsible Status 1 2 3 4
Move Calculations out of Excel Jim Not Started 10 10
Store PDF files in structure Sally In Progress 15 8
Switch to JDK1.5 Pete Completed 10 0 0 0
Install Cruise Control on Team Server Jim Completed 5 0 0 0
LTCS Disk Jim In Progress 10 10
Focus is on each persons estimate of how much work they have to goon tasks, not how much they have done in past.
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Agile Development 12
Burndown Charts
• Tracks project accomplishment to completion
• Provides a visual representation for project completion
• Goes down when progress made, Up when estimates revised
• Sharp drop usually means reduction of features.
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Agile Development 13
Sprint Burndown
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Agile Development 14
Extreme Programming
• A set of engineering processes:– Pair Programming– Collective Code Ownership– Aggressive Refactoring– Test-Driven Development– On-Site Customer– Iterative Development– Continuous Integration
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Agile Development 15
XP Top Level
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Agile Development 16