Better Quality through Scrum

Dominik Jungowski | CHIP Xonio Online GmbH Better Quality through Scrum Montag, 11. Oktober 2010

About me • 26 years old • Working at CHIP Xonio Online GmbH • Developer and ScrumMaster for price comparison • Part - time studies in psychology at FernUni Hagen Montag, 11. Oktober 2010

Agenda • What is Scrum? • How Scrum works • Meetings, Artifacts & Roles • Definition of Done • Bugs • Deductions • Scrum at CHIP Montag, 11. Oktober 2010

What is Scrum? Montag, 11. Oktober 2010

Scrum is... like a recipe Montag, 11. Oktober 2010

Scrum is not... Montag, 11. Oktober 2010

A classical team Stakeholder Developer Stakeholder Developer Project manager Customer Developer Customer Developer Montag, 11. Oktober 2010

A Scrum team Stakeholder ScrumMaster Stakeholder Developer Product Owner Team Customer Developer Customer Developer Montag, 11. Oktober 2010

How Scrum works Montag, 11. Oktober 2010

How Scrum works • Agile project management • Iterations („sprints“) • Framework • Inspect & Adapt Montag, 11. Oktober 2010

How Scrum works Sprint Product Product Project Sprint Product Backlog Sprint Product Potentially shippable product after each sprint Montag, 11. Oktober 2010

How Scrum works Es?mated Sprint Planning I Sprint Planning II Product Backlog Sprint Backlog regularly The Scrum Process every day Es?ma?on Mee?ng Daily Standup Retrospec?ve Review Mee?ng Mee?ng Product Backlog Montag, 11. Oktober 2010

Meetings & Artifacts Montag, 11. Oktober 2010

Product Backlog Meetings & Artifacts • Maintained by the Product Owner • Consists of user stories • Prioritized • Estimated in Estimation Meeting Montag, 11. Oktober 2010

Estimation Meeting What‘s about to come? Montag, 11. Oktober 2010

Es?ma?on Mee?ng Meetings & Artifacts • User stories estimated in storypoints • Estimated by whole team • Knowing what will come • Regularly Montag, 11. Oktober 2010

Es?ma?on Mee?ng Meetings & Artifacts Montag, 11. Oktober 2010

Sprint Planning I Setting the goal Montag, 11. Oktober 2010

Sprint Planning I Meetings & Artifacts • Product Owner presents the Sprintgoal • Product Owner presents the user stories • Team pulls the user stories • Acceptance criteria, etc. are written down Montag, 11. Oktober 2010

Sprint Planning II How to reach the goal Montag, 11. Oktober 2010

Sprint Planning II Meetings & Artifacts „The result of this mee/ng is, that everybody knows how the team can cope the tasks together. You do not decide on who does what.“ -‐ Boris Gloger, Scrum: Produkte zuverlässig und schnell entwickeln Montag, 11. Oktober 2010

Sprint Planning II Meetings & Artifacts • Tasks for selected user stories are generated • Generated tasks take no longer than 8 hours / 1 workday • Sprint Backlog is created • Everybody knows about the „how“ Montag, 11. Oktober 2010

Daily Standup Where do we stand? Montag, 11. Oktober 2010

Daily Standup Meetings & Artifacts • Same time, same place, every day! • Team sychronizes itself • Sprint Backlog is updated • Burndown Chart is updated • Public • Time for discussion afterwards Montag, 11. Oktober 2010

Daily Standup Meetings & Artifacts • What have I done since the last standup? • What will I do until the next standup? • What‘s impeding me? Montag, 11. Oktober 2010

Montag, 11. Oktober 2010

Sprint Backlog Meetings & Artifacts Work in User Story To Do Done Progress Story 1 Task Task Task Story 2 Task Story 3 Task Task Montag, 11. Oktober 2010

Sprint Backlog Meetings & Artifacts Montag, 11. Oktober 2010

Burndown Chart Meetings & Artifacts $)# !"# !*# !$# !)# %&# %&# %&# %*# %'# %)# '*# ')# ')# (# *# )# )# )# %(+),# !)+),# )$+')# )&+')# )(+')# Montag, 11. Oktober 2010

Review Meeting Let‘s show the cake! Montag, 11. Oktober 2010

Review Mee?ng Meetings & Artifacts „The Scrum-‐Team shows the results of their work to the End User. The team members want to have feedback. This feedback can be used to create or change Backlog Items.“ -‐ Scrum with Boris Gloger Montag, 11. Oktober 2010

Review Mee?ng Meetings & Artifacts • Only completed, working software is presented • Slides are forbidden! Nobody wants to eat half-done cake or (even worse) only see an image of it ;-) The cake is not a lie! Montag, 11. Oktober 2010

Retrospective Meeting Improving the cake Montag, 11. Oktober 2010

Retrospec?ve Mee?ng Meetings & Artifacts • Team reflects on last sprint • „Learning from the past for the future“ • Output: – Things the Team wants to improve – Impediments • Similar to a debriefing Montag, 11. Oktober 2010

Inspect & Adapt Montag, 11. Oktober 2010

Tweaking your improvements Montag, 11. Oktober 2010

Tweaking your improvements Rat - Maze - Experiment Experiment by Tolman & Honzik in 1930 3 groups / 17 days Montag, 11. Oktober 2010

Tweaking your improvements -%.*'/'0%1#'/'(23#$45#6.' #!" +" *" )" (" !"#$%&#'($$)$*' '" ,-./0"%" &" %" $" #" !" #" $" %" &" '" (" )" *" +" #!" ##" #$" #%" #&" #'" #(" #)" +%,*' Montag, 11. Oktober 2010

Tweaking your improvements -%.*'/'0%1#'/'(23#$45#6.' '#" '!" &" !"#$%&#'($$)$*' %" ,-./0"#" ,-./0"(" $" #" !" '" #" (" $" )" %" *" &" +" '!" ''" '#" '(" '$" ')" '%" '*" +%,*' Montag, 11. Oktober 2010

Tweaking your improvements -%.*'/'0%1#'/'(23#$45#6.' '#" '!" &" !"#$%&#'($$)$*' %" ,-./0"'" ,-./0"#" ,-./0"(" $" #" !" '" #" (" $" )" %" *" &" +" '!" ''" '#" '(" '$" ')" '%" '*" +%,*' Montag, 11. Oktober 2010

Reward your team! Montag, 11. Oktober 2010

Have a BBQ! Montag, 11. Oktober 2010

Roles Montag, 11. Oktober 2010

Product Owner • Responsible for the product • Maintains the Product Backlog • Has the vision Montag, 11. Oktober 2010

Team • Self - organized • Delivers • Delivers • Delivers Montag, 11. Oktober 2010

ScrumMaster • Monitors the Scrum process • Causes course correction • Removes impediments • Protects the team Montag, 11. Oktober 2010

Impediments • Disturb the team • Hold back the team • Impediment Backlog (like Sprint Backlog) Montag, 11. Oktober 2010

Definition of Done Montag, 11. Oktober 2010

Montag, 11. Oktober 2010

Definition of Done Work in User Story To Do Done Progress TaskStory 1Task Tas TaskStory 2 TaskStory 3 Task Montag, 11. Oktober 2010

Definition of Done • Checklist • Defines when Tasks can be moved to „Done“ • Defines when User Stories can be moved to „Done“ Montag, 11. Oktober 2010

Definition of Done • Responsibility lies with the team • Maintained by the team only • Potentially shippable product every day Montag, 11. Oktober 2010

Definition of Done Example: DoD for Tasks – Unit Tested – Runs in the following browsers: Firefox, Internet Explorer, Chrome, Safari – No broken unit tests – Refactored – Reviewed Montag, 11. Oktober 2010

Definition of Done Example: DoD for User Stories – No broken unit tests – Merged into trunk • Additional criteria for specific user stories can be set in Sprint Planning I Montag, 11. Oktober 2010

Bugs Montag, 11. Oktober 2010

Bugs • Put them on your Sprint Backlog • Fix them immediately! • Fixed at best until the next daily standup • If possible: Don‘t use bugtrackers Montag, 11. Oktober 2010

Bugs Work in User Story To Do Done Progress TaskStory 1Task Tas Story 2 Task Bug Story 3 Task Task Montag, 11. Oktober 2010

Bugs &#" &!" %#" %!" $#" $!" #" !" %" &" '" #" (" )" *" +" $!" $$" $&" $'" $#" $(" $)" $*" $+" %!" %$" %%" %&" %'" %#" %(" %)" %*" %+" &!" &$" Montag, 11. Oktober 2010

Bugs 180 166,98 158,42 160 145,09 140 120 100 89,64 83,77 83,97 Stunden 80 60 50,84 52,24 37,67 40 25,6 26,73 23,57 19,04 19,87 16,29 20 11,69 10,01 0 0,67 0 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Montag, 11. Oktober 2010

Bugs !"#$%&%'()*+,)-.(% 00.001 00.001 00.000 00.000 00.000 00.000 00.000 2 5 8 11 15 18 21 24 27 30 Montag, 11. Oktober 2010

Bugs Example: DoD for Bugs – Unit tested – No broken unit tests – Fixed in the following browsers: Firefox, Internet Explorer, Chrome, Safari – Distributed to all web servers Montag, 11. Oktober 2010

Bugs What about old Bugtracker lists? – Fix all the bugs or – Delete the list Montag, 11. Oktober 2010

Deductions Montag, 11. Oktober 2010

Deductions No upfront design constant refactoring Montag, 11. Oktober 2010

Deductions Working at the same Pair Programming user story Montag, 11. Oktober 2010

Deductions Code Reviews Pair Programming Montag, 11. Oktober 2010

Deductions Collective Code Team commitment Ownership Montag, 11. Oktober 2010

Deductions Collective Code Pair Programming Ownership Montag, 11. Oktober 2010

Deductions Fixing bugs immediately Test - Driven Nobody likes fixing bugs Development Definition of Done Montag, 11. Oktober 2010

Deductions Test - Driven Continuous Development Integration Montag, 11. Oktober 2010

Scrum at CHIP (Price comparison only) Montag, 11. Oktober 2010

Bugs per Month &,' !"#$%&&&&&&' !$' !,' !,,%' ("#""""""""' ($' (!#)(*****+' !,,)' !,(,' (,' $' ,' Montag, 11. Oktober 2010

Items per Person %*$ %&$ %)$ %($ '$ *$ &$ )$ !"#$ %&"'$ ($ +,-./$('$0$+12134$('$ +,-./$(5$0$+12134$(5$ Montag, 11. Oktober 2010

„Companies, managers should understand, that their employees want to work. Trust them, that they want to do a good job.“ hLp://feedproxy.google.com/~r/borisgloger-‐de/~3/U2zztp7jcW8/ Montag, 11. Oktober 2010

Questions? Montag, 11. Oktober 2010

Literature Ken Schwaber: „Agile Project Management with Scrum“ (Microsoft Press) Montag, 11. Oktober 2010

Literature Boris Gloger: „Scrum: Produkte zuverlässig und schnell entwickeln“ (Hanser Fachbuch) Montag, 11. Oktober 2010

Literature Mike Cohn: „Succeeding with Agile: Software Development using Scrum“ (Addison-Wesley Signature) Montag, 11. Oktober 2010

We‘re hiring! Developer for price comparison and more - see www.chipxonio.de Montag, 11. Oktober 2010

Thank you! Twitter: @djungowski Blog: www.phpdevblog.net Montag, 11. Oktober 2010

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Better Quality through Scrum

by Dominik Jungowski on Oct 12, 2010

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Better Quality through Scrum — Presentation Transcript