20111117 Is Software Evolution really effective? @XPDayGE2011 Karlsruhe-GE [ENG]

Anti-IF Campaign:Is Software Evolutionreally eﬀective?XPDays Germany 2011Karlsruhe 17.11.2011Francesco Cirillo • Director, Anti-IF Schoolfrancesco@antiifschool.com • @antiifschool

About meFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

The Anti-IF Campaign Kent Beck Craig Larmanhttp://www.antiifcampaign.com/join-the-campaign.html Francesco Cirillo • Director, Anti-IF School XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Code Monsters McCabe Index = 300Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Is Software Evolution Really Eﬀective? What does software evolution really mean? How much should eﬀective software evolution cost?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Software DevelopmentFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Software Engineering da “Evolutionary Biology” Douglas J. Futuyama 1998, pag 653Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

What is your strategy?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

100% Flexible...Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

IF-based evolution strategyFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

EmergentFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

What is the most eﬀective TDD?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Earnings ROI = CostsFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

A good startup should not onlygenerate income but also have ateam capable of wisely reducingits costs. Francesco Cirillo • Director, Anti-IF School XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

How much does it cost?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

How much does eﬀective SoftwareEvolution cost?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

What about adding similar featuresCosts Time Mature Team’s Evolutionary Marginal Cost For Similar Features 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 XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Pomodoro AppsFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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 XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Lesson #1Software Evolution costs too much Francesco: “Would you buy your own software?” App’s Developer: “NO!”Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Is Software Evolution cost eﬀective? NO!Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Too costlyFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Lesson #2 Mature teams cost more Recently formed team Mature teamFrancesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

Are you really improving your process or feeding your Code Monster?Quality Eﬀectiveness of Investment in Process Improvement Time Perceived internal quality of software Eﬀort spent on Process Improvement Francesco Cirillo • Director, Anti-IF School XPDays Germany francesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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

Thanks for listening. Questions?Francesco Cirillo • Director, Anti-IF School XPDays Germanyfrancesco@antiifschool.com • @antiifschool Karlsruhe, 17.11.2011

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20111117 Is Software Evolution really effective? @XPDayGE2011 Karlsruhe-GE [ENG]

by Francesco Cirillo on Dec 17, 2011

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20111117 Is Software Evolution really effective? @XPDayGE2011 Karlsruhe-GE [ENG] — Presentation Transcript