agile in practice benjamin booth spring 2010. 2 proprietary 2 author/blogger benjaminbooth.com
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Agile In PracticeBenjamin Booth
Spring 2010
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Author/Bloggerbenjaminbooth.com
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Programmer/Architect
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1970 – Winston Royce – first to describe Waterfall model Restrict change to improve predictions Drive with the plan Communicate with documents Programmers are interchangeable
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Waterfall Is Expensive!
51% of all IT projects are either over time, over budget, and/or lacking critical features and requirements
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Space shuttle flight control system Requirements are well defined Unlimited resources Useful for < 5% of all software projects
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The site shall have a ‘nice looking’ menu page for an existing restaurant’s seven year old website. (Nice looking is defined by the customer.)
The system shall have the ability to edit the menu online. Current menus are stored in a MS Word document.
The site shall have a ‘Suggestion’ capability. Users can use a form to submit suggestions which get stored and also emailed to the owner.
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People (users) are the focus Measure success with working software Expect and embrace change Use small, skilled, motivated teams
agilemanifesto.org
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Japanese origin Whole team 1995 OOPSLA, by Jeff Sutherland and Ken
Schwaber Skeleton of practices and roles
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SCRUM Workflow
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“A pig and a chicken are walking down a road. The chicken looks at the pig and says, "Hey, why don't we open a restaurant?" The pig looks back at the chicken and says, "Good idea, what do you want to call it?" The chicken thinks about it and says, "Why don't we call it 'Ham and Eggs'?" "I don't think so," says the pig, "I'd be committed but you'd only be involved."
Product Owner: Manages the backlog A team member who is the voice of the customer
Scrum Master: Coach the process Team Member: Write code Everyone else is a “chicken”E
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Backlog Sprint Burn
Down Sprint Backlog Past Backlogs
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Store Backlogs electronically Use physical Task Boards
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• Backlog
• Sprint Backlog
• Taskboard
• Sprint Burn Down
Artifacts
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• Backlog
• Sprint Backlog
• Taskboard
• Sprint Burn Down
Artifacts
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Artifacts
• Backlog
• Sprint Backlog
• Taskboard
• Sprint Burn Down
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Artifacts
• Backlog
• Sprint Backlog
• Taskboard
• Sprint Burn Down
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What type of documentation would we use for
requirements in scrum?
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Create min/max scale. Ex: 1 - 100 Id your easiest, medium, and hardest
stories. Easiest = 1 point Medium = 50 points Hardest = 100 points
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Keep old Sprint Backlogs & Burndowns Keep old tasks Use for velocity calculations Helps identify trends
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• Each developer has a set of cards with estimation values
• A user story is presented
• Each developer picks the card representing the number of story points the user story should take
• Everyone then shows their cards
• Discussion happens until agreement on a number
• Repeat for each user story
• Schedule a sprint with the required number of story points based on your team’s velocity
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Planning Poker
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easily navigate to the menu from the home page so that I can make a phone order (delivery)
be able to make suggestions for improvements to my overall dining experience
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create, update and delete menu items so that it stays interesting and keeps people coming back
generate a PDF of the menu so that I can give it to the printer for creating ‘real’ menus
get customer feedback emailed to me so I can quickly respond to problems and also pass on compliments to the staff
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Access to real customers Proxy customer/user?
Large, distributed teams Scrum of scrums? Highly collaborative tools?
Industry misperceptions Engage and educate
Command-and-control culture Find a new job Start your own company
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Waterfall or nothing still predominant Agile is highly adaptive, people centric SCRUM is an effective Agile process
skeleton If your process isn’t working adapt it
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Introduce incrementally Business strategy and architecture a must Get everyone speaking the same
language
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Allocate QA time explicitly Keep PM simple but do it Keep improving your process
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Q&A
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http://en.wikipedia.org/wiki/Agile_software_development http://www.waterfall2006.com/ http://www.agileManifesto.org/ http://www.codinghorror.com/blog/archives/000588.html http://www.drdobbsonline.net/architect/207100381 http://en.wikipedia.org/wiki/Scrum_%28management%29 http://spectrum.ieee.org/sep05/1685/failt1
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