Using Scrum - IWMW 2009 (workshop)

Scrum: Sprints not Marathons Andrew Male University of Bath

History • 1995 Ken Schwaber & Jeff Sutherland design Scrum • 2001 Agile Manifesto • 2001 Schwaber & Mike Beedle co-author Agile Software Development with Scrum • 2006 Scrum Alliance became a legal entity

Agile • The term covers a set of ideals or aims “Agile Mainfesto” • Iterative and Incremental • Empirical approach • Inspect and adapt • Embrace change

Agile • The term covers a set of ideals or aims “Agile Mainfesto” • Iterative and Incremental • • Individuals and interactions over processes and tools Working software over comprehensive documentation • Empirical approach • • Customer collaboration over contract negotiation Responding to change over following a plan • Inspect and adapt • Embrace change

Agile • The term covers a set of ideals or aims “Agile Mainfesto” • Iterative and Incremental • Empirical approach • Inspect and adapt • Embrace change

The Scrum Process

Diagram by - http://www.mountaingoatsoftware.com

Scrum Roles • Product Owner • Scrum Team - suggested maximum of 8 • Scrum Master

Estimating the backlog • Product backlog is estimated by the team • Can use ideal days, hourly estimates or story points • There should be just enough discussion to estimate • Use estimates to decide what goes into the sprint backlog

Sprints • Time boxed between 2 - 4 weeks • Results in a deliverable product to the client • Projects need to be vertically sliced to work in iterations • Continue to iterate while there is value to deliver

Daily Scrum • What have you done since the last Scrum? • What will you do between now and the next Scrum? • What got in your way?

Sprint review • Present the product to the Product Owner • Decide if the sprint goal has been achieved

Sprint retrospective • Look back at the sprint • We are looking for answers to the following questions: • What went well? • What should we do differently next time? • What did we learn? • What confuses us?

A changing environment “... if we decide we need a system for something we set a project group up, write a speciﬁcation, go out to tender, evaluate the tenders, go on site visits, deliberate, and come up with a preferred solution (or decide to develop something ourselves). We them move into implementation phase, and by the time a system is live it could be 2 years later (or more in some cases). By then the market has changed dramatically, as have the user requirements. In contrast, we will implement a new mail service for students in about 10 weeks by outsourcing to a innovative company.” Christine Sexton - Director IT Services - University of Shefﬁeld

Build a Lego farm

Farm Scrum • Estimate all the work to be done • Plan the work that will go into the ﬁrst sprint (create sprint backlog) • 3 iterations (sprints) • Demo after each sprint

A story card

Estimation • Estimate story points on a scale - 1, 2, 3, 5, 8, 13, 20, 40, 100 • Story points are relative measures of the effort involved • We are better and quicker at relative estimation • Group activity - planning poker can help

The farmer wants a sty to stop his pigs wandering off • Holds 5 pigs • Space for 2 troughs • Pigs can’t wander off • Has a gate for access 1, 2, 3, 5, 8, 13, 20, 40, 100

The ducks need a ponds to live on • Has a small island in the middle 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer wants a trailer for his tractor • Can carry 4 farm animals • Only uses one set of wheels 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer wants a house • Has a pitched roof • Two entrances • 3 windows • Large enough for him and his wife 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer needs a trough to feed his pigs • Big enough to feed three pigs at a time 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer wants a grain silo for his harvest • Must hold 25g of grain • Grain stored through removable lid • Access hatch at the bottom 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer needs a kennel for his sheep dog 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer’s wife needs 3 ﬂower tubs around the house • Big enough for 2 bunches of ﬂowers each 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer’s wife keeps show chickens. She needs a coop to protect them from the cunning Mr Fox • Has two perches for chickens to roost • Raised off the ground • Sloping ramp that can be removed • Door that closes 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer needs a barn for storing hay • Twice as big at the farmer’s house • Has two ﬂoors 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer needs a shed to store his old rusty tractor in • The tractor ﬁts inside 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer wants a new LEGO 3000 combine harvester which will make his farm 3x more proﬁtable 1, 2, 3, 5, 8, 13, 20, 40, 100

Photo by Peppered - http://www.ﬂickr.com/photos/peppered/

The farmer needs a small paddock for his miniature ponies • Fence is high enough to keep the ponies in 1, 2, 3, 5, 8, 13, 20, 40, 100

The farmer’s dog is lazy so he wants a quad bike so he can round up his sheep • Must have 4 wheels! • Farmer can sit on it securely 1, 2, 3, 5, 8, 13, 20, 40, 100

Sprint planning • 2 minutes to decide what you will do in the ﬁrst 5 minute sprint • Write the total points in the ﬁrst “Points to complete” box • Don’t start building yet!

Sprint Review • Demo what you have done to the Product Owner • Incomplete stories should be re-estimated based on the remaining work to complete • You don’t have to continue with a partially completed story • In the next sprint commit to the same number of points

Retrospective

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Using Scrum - IWMW 2009 (workshop)

by Andrew Male on Aug 03, 2009

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Using Scrum - IWMW 2009 (workshop) — Presentation Transcript