20111119 Is Software Evolution really effective? @IAD2011 Rome-IT [ENG]

Anti-IF Campaign:Is Software Evolutionreally eﬀective?Italian Agile DayRoma 19.11.2011Francesco Cirillo • Director, Anti-IF Schoolfrancesco@antiifschool.com • @antiifschool

Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

About meFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

The Anti-IF Campaign Kent Beck Craig Larmanhttp://www.antiifcampaign.com/join-the-campaign.html Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Code Monsters McCabe Index = 300Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Is Software Evolution Really Eﬀective? What does software evolution really mean? How much should eﬀective software evolution cost?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software DevelopmentFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Is this what really happens? Not at all! Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Requirement 1 Architecture NFRRequirement 2 Coding Testing Requirement 2 Analysis Design FRRequirement n Requirement n Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Requirement 1 Architecture NFRRequirement 2 Coding IT#1 Testing IT#1 Requirement 2 Analysis Design FRRequirement n Coding IT#2 Testing IT#2 Requirement n Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Requirement 1 Architecture NFRRequirement 2 [Testing, Coding, Refactoring] IT#1 Requirement 2 Analysis Design FRRequirement n [Testing, Coding, Refactoring] IT#2 Requirement n Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Extension versus ChangeFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Requirement 1 Architecture NFRRequirement 2 [Testing, Coding, Refactoring] IT#1 Requirement 2 Analysis Design FRRequirement n [Testing, Coding, Refactoring] IT#2 Requirement n Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Analysis 1 Architecture NFR 1 Coding 1 Testing 1 Requirement 1 Design FR 1Requirement 2 Analysis 2 Architecture NFR 2 Coding 2 Testing 2 Requirement 2 Design FR 2Requirement n Analysis n Architecture NFR n Coding n Testing n Requirement n Design FR n Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Analysis 1 [Test + Codi ca + Refactoring] 1 [Test + Codi ca + Refactoring] 1 [Test + Codi ca + Refactoring] 1 Testing 1? Requirement 1 Requirement2 Analysis 2 [Test + Codi ca + Refactoring] 2 [Test + Codi ca + Refactoring] 2 [Test + Codi ca + Refactoring] 2 Testing 2? Requirement 2 Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software LifecyclesRequirement 1 Requirement 1 Architecture NFRRequirement 2 [Testing, Coding, Refactoring] IT#1 Requirement 2 Analysis Design FRRequirement n Requirement 1 Analysis 1 [Test + Codi ca + Refactoring] 1 [Test + Codi ca + Refactoring] 1 [Test + Codi ca + Refactoring] 1 Testing 1? Requirement 1 Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Software Engineering da “Evolutionary Biology” Douglas J. Futuyama 1998, pag 653Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Evolution “In biology the term evolution means the gradual and continuous accumulation of modifications over a sufficiently long period of time in which significant changes manifest in living organisms”. Source WikipediaFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Evolutionary process “It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.” Charles DarwinFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

What is your strategy?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

100% Flexible...Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

IF-based evolution strategyFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

EmergentFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

What kind of TDD do you do? Copyright 200-2006 Scott. W. Ambler Add a test [Pass] Run the tests Make a little change [Pass, Development [Fail] continues] Run the tests [Pass, Development stops]Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

What is the most eﬀective TDD?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Evolution & Emergent• These words tell us nothing about what should be done and what should not be done.• They don’t give you a test as to when to do something or how to do it.• They don’t say anything about how that continuous accumulation of modi cations should happen.• They just say that your software can be called evolutionary because it derives from a continuous accumulation of modi cations.Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Is Software Evolution Really Eﬀective? What does software evolution really mean? mean How much should eﬀective software evolution cost?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Earnings ROI = CostsFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

A good startup shouldnot only generate incomebut also have a teamcapable of wiselyreducing its costs.Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

How much does it cost?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

How much does...eﬀective Software Evolution cost?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

What about adding similar features Mature Team’s Marginal CostCosts Mature Team’s Evolutionary Marginal Cost For Similar Features Time Francesco Cirillo • Director, Anti-IF School XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Is this what really happens? Not at all! Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Adding new features to our system Evolutionary Marginal CostsCosts Eﬀective Evolutionary Marginal Costs Time Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Pomodoro AppsFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Requirements Pomodoro 1.0 Show a Pomodoro background Set the timer bypressing a button Ring after Total cost: 10.000 € 25 minutes Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Lesson #1 Software Evolution costs too much Francesco: “Would you buy your own software?” App’s Developer: “NO!”Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Is Software Evolution cost eﬀective? NO!Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Too costlyFrancesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Lesson #2 Mature teams cost more 20.000 € Recently formed team Mature team 10.000 €Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Are you really improving your process or feeding your Code Monster? Eﬀectiveness of Investment in Process ImprovementQuality Eﬀort spent on Process Improvement Perceived internal quality of software Time Francesco Cirillo • Director, Anti-IF School Italian Agile Day francesco@antiifschool.com • @antiifschool Roma, 19.11.2011

Would you buy your own software? Software can be built in an evolutionary way. Evolutionary development costs too much. We are not conscious enough of the strategies.Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Do you want to be involved? Would you buy your own software? What does the term evolution mean to your team? Would a team less “mature” than yours have lower costs? Consider you have to introduce a second feature that is similar to something you’ve already done. Does it cost less than the rst time you did it? Why? http://www.antiifcampaign.com/2011/11/would-you-buy-your-own-software.htmlFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Do you want to be involved? http://www.antiifcampaign.com/2011/11/would-you-buy-your-own-software.htmlFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Thanks for listening. Questions?Francesco Cirillo • Director, Anti-IF School Italian Agile Dayfrancesco@antiifschool.com • @antiifschool Roma, 19.11.2011

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20111119 Is Software Evolution really effective? @IAD2011 Rome-IT [ENG]

by Francesco Cirillo on Dec 17, 2011

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20111119 Is Software Evolution really effective? @IAD2011 Rome-IT [ENG] Presentation Transcript