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practicing agile development since 2002 csm x 4, cspo x 2 contracted ken schwaber taught agile to 100s agile alliance, acm, ieee mike cohn disciple delivered.

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Presentation on theme: "practicing agile development since 2002 csm x 4, cspo x 2 contracted ken schwaber taught agile to 100s agile alliance, acm, ieee mike cohn disciple delivered."— Presentation transcript:


2 practicing agile development since 2002 csm x 4, cspo x 2 contracted ken schwaber taught agile to 100s agile alliance, acm, ieee mike cohn disciple delivered dozens of projects w/agile been through 100s of sprints agile bio

3 references mike cohn, agile alliance, scrum alliance, crisp blog,

4 a great time to be in software development agile development is a well established practice agile adoption is high many companies practicing agile development many companies are in agile transition

5 software anthropology empowers the team leverages collaboration focus on organizing your work continuously improve adoption of best practices creating a cadence preface

6 software development notoriously difficult to deliver on-time on-budget quest for determinism estimation models formalized processes organizations to manage process documentation driven

7 differences command & control document driven serial in nature big upfront design test late bureaucratic Heavy, rigid process team & roles self managing team high bandwidth communication iterative evolutionary/iterative design test early collaboration Lightweight, tailorable process team & roles non-agile development agile development

8 waterfall system requirements detailed requirements functional specification high level design detailed design code test delivery system requirements specification software requirements specification marketing requirements document functional specification high level design document detailed design document code complete milestone qa acceptance document product launch

9 scrum design + code + testplandefinereview iterate user stories functional software

10 agile manifesto 2001 individuals and interactions over processes and tools working software over comprehensive documentation customer collaboration over contract negotiation responding to change over following a plan

11 agile tenants build software incrementally deliver value quickly commitment driven self organizing and managing teams continuous improvement high bandwidth communications evolutionary design customer intimacy success is functioning software maintain a sustainable pace

12 scrum oopsla 1995, schwaber & southerland lightweight process framework ability to incorporate best practices inspection and adaptation - error correction iterate and refactor time-boxes collocated teams quality never sacrificed for dates shippable product quality at each sprint definition of done

13 done code complete all code checked into source code control (TFS) all tests checked into source code control passes coding standards (stylecop) passes peer code review (team review) passes static code analysis (ndepend) builds on build server (tfs) builds with no warnings in pre-build area (shelf set) all unit test & test automation executes in dev/qa/pre-prod environments all unit test pass unit test code coverage is 65% no priority 1 defects no profiling issues (dotTrace) documented accepted by product owner

14 scrum team pigs (no chickens) team size 7-12 pigs cross functional sm, po, dev, qa, ia, design self managing collocated

15 roles product owner classically the product manager maximizes roi of each sprint manages the product backlog scrum master development manager or project manager enforces process, insures process adherence impediment removal facilitates communications scrum team cross functional team that builds the product maintains sprint backlog

16 user stories a feature description as a, i want so that invest independent negotiable valuable to users estimate-able small testable

17 product backlog the new age requirement specification/mrd/prd live repository of all project work user stories defects managed by product owner contributed to by anyone prioritized estimated by scrum team story points subset moved to sprint backlog; every sprint

18 scrum basic mechanics Product Owner Defining user stories Refines user stories Release planning User Story Estimation Scrum team together estimates each user story (points) Task Breakdown Scrum team together creates tasks (hrs) for each user story Sprint PlanningSprint ReviewDaily Scrum Daily meeting Standup Same time, same place 15min time-box All Scrum team members Task movement Answer 3 questions Accomplished in last 24hrs Working on next 24hrs Impediments Review Burndown … Demo PO demos each completed user story for acceptance Retrospective Scrum team does a post mortem on the sprint Product Backlog Sprint Backlog 2 Time-boxed meetings User Story Estimation Task Breakdown 2 Time-boxed meetings Demo Retrospective New age MRD/PRD Live repository

19 flow

20 sprint planning first day of the sprint product backlog - n hour time-boxed backlog walkthrough estimate and prioritize stories sprint backlog - n hour time-boxed list tasks for implementing stories assign hours and resources

21 estimation story points relativistic educated guessimate of effort not directly correlated to time non-linear numbers like fibonacci sequence t-shirt sizing (xs,x,m,l,xl) use for sprint planning (capacity) epic story too large to fit in a sprint broken down into smaller stories

22 estimation process product backlog estimation discuss of each story planning poker - team until backlog empty or time-box expires prioritize – by po assign stories to sprint backlog based on teams velocity assume initial velocity as 65% assign tasks to sprint stories <8 hour tasks *assign owners adjustments move stories back if velocity is exceeded

23 planning poker iterative approach adapted from delphi entire scrum team participates everyone has a deck of story point cards user story discussion everyone selects a card privately cards are revealed discuss outliers re-estimate till convergence or timebox

24 sprint backlog repository of work for each sprint user stories broken down into tasks task granularity 8-16hrs managed by scrum team updated daily, in real-time

25 composition

26 electronic task board

27 physical task board

28 daily scrum daily meeting same place, same time time-boxed 15 minutes standup $1 for being late no one can interrupt the current speaker keep details post daily scrum 3 questions what did you accomplish in the last 24 hrs? what are you going to work on in the next 24hrs? any impediments? review burndowns post scrum

29 daily scrum

30 burndown chart

31 sprint review last day of the sprint demo - n hour time-boxed demonstrate sprint accomplishments story acceptance walk through log defects for next sprint retrospective - n hour time-boxed what went right? what went wrong? what can we do to improve?

32 best practices relativistic estimation evolutionary design vertical slices continuous integration test early, test often high flow eliminate waste fail quickly shorter sprints test driven development pair programming peer code review information radiators

33 scrum anti-patterns manager estimates work developers not doing their own task breakdowns untrackable sprints no customer value in sprint partially complete sprints story or task creep in sprint backlog no definition of done working on tasks not in the sprint backlog qa under utilized testable software completed late in the sprint lack of peer accountability or commitment impediments not immediately addressed floating timeboxes

34 continuous integration build automation system builds are triggered by source code check-ins unit tests are executed as part of each build tests are executed in the context of a profiler static code analysis each build is versioned each build is deployed test automation scripts execute

35 real world agile web development site development team composition 6 developers 2 qa engineers 1 ia 1 designer 1 scrum master 1 product owner

36 site development established cadence 1 week sprints cascading deliverables 5 weeks of ia & design 6 weeks of development ~390 us, ~4000 tasks velocity: 69-79% wireframing & user stories graphic design/site layout development

37 development environment rally for agile lifecycle management product backlog sprint backlog project boards burndowns & metrics microsoft shop c#,.net framework 4.0 mvc 3.0 castle windsor di endeca search engine subversion ndepends nunit, selenium

38 page template inventory n page types home department brand browse search results best selling special, gift, promotion collection sku cart / account help and other static content

39 page decomposition page elements header footer left navigation right spine body

40 page element decomposition header (user controls) main image primary navigation secondary navigation search minicart account/sign in breadcrumbs

41 sashimi slices vertical sliver presentation tier mvc user controls business logic/application tier injected via di rules for content acquisition/filtering/sorting page rules - seo, microformats, analytics, remarketing data tier content retrieval

42 release planning 4hr timebox release 1 minimal deliverable feature set release 2 defects international shipping reporting release 3 site enhancements

43 sprint planning 2hr timebox consume 2-4 page types per sprint address higher risk stories first critical tasks addressed first

44 sprint review 2hr timebox capture defects add to product backlog retrospective iterate until product backlog is empty

45 whats next

46 questions

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