Sam Guckenheimer [email protected] Microsoft Corporation.
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Transcript of Sam Guckenheimer [email protected] Microsoft Corporation.
Turning Walls Into BridgesSam [email protected] Corporation
All Processes Are Rooted In Fear (Kent Beck)
Dev Dev Dev Dev Dev
The ‘90s: Basic Tools
Early tools focused on isolated tasks, such as source control
Dev Dev Dev Dev Dev
The ‘00s: Value Up Software Engineering
Trustworthy Transparency bridges the team
PM Devs DB Test Arch
PM Devs DB Test Arch
Changing the ParadigmLean Application Lifecycle
Reduction of Waste →Small batches
Short cycles
Flow of Value →Working software Quality first
Changing the Paradigm
Traditionally, we decompose tasks and measure completion This is the cost accounting tradition
Alternatively, we account for customer value incrementally delivered This is the Lean Manufacturing and Theory of Constraints model
Work Down
Rem
ain
ing W
ork
PlanTask 1Task 2Task 3Task 4 Va
lue
Value Up
How Far Can We Get In The Available Time?
Work planned
Work completed
What Is Our Software Quality?
Test rates (pass, inconclusive, fail) shown in bars
Against code coverage, …
code churn, …
and active bugs
A Venerable Truth
Happy families are all alike; every unhappy family is unhappy in its own way.
Tolstoy, Anna Karenina
Все счастливые семьи похожи друг на друга, каждая несчастливая семья несчастлива по-своему.
Signs Of Unhappiness
UnderestimatingUneven Task DecompositionSolution Stuck in TestingDevelopment Practices Too LooseInadequate Unit TestingTests Passing; Solution Doesn’t WorkToo Little TestingBuild FailuresScope CreepResource Leaks
Underestimating
Steady rates of progress, but slope too shallow
Slow progress leading to cuts in planned work, but not enough cuts
Solution Stuck In Testing
Bulge in resolved →Insufficient resources or inadequate quality from dev
Development Practices Too Loose
Growing “Fault Feedback Ratio” – bugs requiring multiple handling
Inadequate Unit Testing
Rising Code Churn
Falling Code CoverageFewer Passing and More Inconclusive Tests
Scope Creep
“Dark matter” emerging during iteration
Planned work is squeezed out
Process Enacted By Tooling
Process Enacted In Cycles
Uncovered code by method
The lines in question
What Code Hasn’t Been Tested?
Unit tests for both application and database tiers
Down To The Individual Check-In
Check-in dialog captures the workitems resolved with the code(and tests) delivered
Policy makes sure that the association is made(and unit tests and code analysis have been run)
Build Verification Test results as part of the build process
Who checkedin what?
Automated release note: Why the work was delivered
And Up To The Team Build
Load test captures both test-generated data and metrics on the servers under test
Identify Performance Under Load In Time To Act…
Running the test with profiling pinpoints hotspots in code
Supporting Heterogeneous Development
Web Access Client for NON-development roles
Eclipse integration as partner solution for
heterogeneous environments
We Document For The Auditor
…because there is a complete audit trail on all the tasks, code
and tests…
Capturing evidencedoes not have to be a
manual process, ...
demoHow Microsoft Uses VSTS
Actual Feature Flow In Orcas (VS 2008)
Initial planning spike
Beta 1 planning review
Beta 2 review
Tightened process rules @ Beta 1 reduce WIP
Additional tightening @ Beta 2
Quality Gates
Quality Gates act as extended check-in policies, governing the quality of feature delivery into the main source code branch
Value Props, Experiences, And Features
Features are designed from Value Propositions and Experiences
Drilldown: Value Prop → Feature Status review rolls up features and
experiences back into value props to assess release readiness
Drilldown from value prop shows detailed feature status
Others Prefer To Review In VS…
Same value prop…
Or In Excel….
Same value prop…
Value Up: How It Feels
The right thingDone rightIn the right way
PM
Arch
Test
Devs
DB
Looking Forward: The ‘10s
PMO Operations Designers Customers Business Analyst
PMOOperationsDesigners CustomersBusiness Analyst
PM
Arch Test Devs
DB
How It Feels
The Wall Becomes a Bridge
Visual Studio Team System
Naked Self-PromotionFor More Information…