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  437. <h1>
  438. <span><a id="jumper" href="#jumpto" title="Un peu perdu ?">?</a></span>
  439. Economy of Scope (archive)
  440. <time>Pour la pérennité des contenus liés. Non-indexé, retrait sur simple email.</time>
  441. </h1>
  442. <section>
  443. <article>
  444. <h3><a href="https://m.facebook.com/notes/kent-beck/economy-of-scope/1041710055861858">Source originale du contenu</a></h3>
  445. <div class="bc bd be"><p class="bf bg">Since I began paying attention to business at an improbably young age, I can remember hearing about “economy of scale”: the more of a thing you make, the cheaper it gets. Somehow, economy of scale got turned into a “more is better” religion, though, and pounded in where it doesn’t fit. Misused, economy of scale results in overproduction, waste, and detachment from genuine human needs. “People don’t want it? We’ll make so many so cheap they won’t be able to help themselves.”</p><p class="bf bg">I began studying lean manufacturing fifteen years ago because the parallels with software development were so striking. The making of a thing results in the thing, which we can sell for money, but it also results in feedback about the making process, feedback you can use to improve future making.</p><p class="bf bg">Mass production assumptions still underlie much of today’s software development. When I want to contrast mass production with lean production, I need a clear contrast to “economy of scale”. Ten years ago the phrase “economy of scope” popped into my head (I don’t know if it was original--few ideas are). The problem with the phrase is that, although I was certain it was correct, I didn’t know what it meant. After ten years of intermittent gnawing, I think I finally get it.</p><figure class="bf bh"><div class="bi bj"><div><img src="https://scontent-mrs1-1.xx.fbcdn.net/hphotos-xap1/v/t1.0-9/12096177_10153702339633675_662110637596005702_n.jpg?oh=8ced9cb02c0c1e7d623c2fdceccf8785&amp;oe=56C15801" class="bk k"/></div><p class="bl bm bn">When things are more valuable than learning</p></div></figure><p class="bf bg">Mass production is founded on the assumption that the value of the things you produce is greater than the value of what you learn. As you make more, you learn more, but slowly. That’s okay, because you’re going to make millions more that will benefit from your learning. No rush.</p><figure class="bf bh"><div class="bi bj"><div><img src="https://scontent-mrs1-1.xx.fbcdn.net/hphotos-xap1/v/t1.0-9/12143301_10153702344138675_3217965123221795113_n.jpg?oh=7f82499c4115788e8132e1f421f77353&amp;oe=56AECB51" class="bk k"/></div><p class="bl bm bn">When learning is more valuable than things</p></div></figure><p class="bf bg">When you reverse the proportion, when learning is more valuable than things, then economy of scale goes haywire. Putting off learning because “oh, we’ll make a million more,” no longer makes sense. The leverage is in learning, not production. You are willing to sacrifice today’s production for tomorrow’s improvement.</p><p class="bf bg">Economics still applies, but the tradeoff has shifted. Instead of trying to get economy of scale by going through many iterations of making per unit time, you try to get economy of--wait for it--scope, by squeezing as much learning as possible from each iteration. That’s what economy of scope is, improving learning per iteration.</p><p class="bf bg">Take Facebook as an example. We’ll account for value in terms of “making the world more open and connected” (I’ll discuss this in a future note). How much more open and connected was the world when the first site went up?</p><figure class="bf bh"><div class="bi bj"><div><img src="https://scontent-mrs1-1.xx.fbcdn.net/hphotos-xal1/v/t1.0-9/12088089_10153702351503675_3743356531799661347_n.jpg?oh=16cf5c42a13b9e209a1fa86b4d95982a&amp;oe=56BC79F7" class="bk k"/></div><p class="bl bm bn">Original Facebook home page</p></div></figure><p class="bf bg">Hardly at all--the functionality was limited and the audience even more so. What <span class="bo">was</span> valuable was the learning, both about the functionality of the site and its implementation. Every increment of Facebook since then has been more valuable as a learning experience than as a creator of “open and connected”. Because we collectively learned, though, the functionality thrown out as a side effect of all this learning reaches one-and-a-half billion of the seven billion people on the planet.</p><p class="bf bg">Facebook’s engineering style is ridiculously inefficient when looked at through economy of scale glasses. Better planning and tracking, more coordination, and more engineering discipline would result in much lower costs. Unfortunately, this engineering utopia is unreachable because we’re building unprecedented features at unprecedented scale. The second time would be much faster, but this is the first time. We had no choice but to abandon economy of scale in favor of economy of scope. It’s not clear how we could have learned more and put it in service to this many people more efficiently than we did.</p><p class="bf bg">Ironically, scale is the most easily distinguishable feature of Facebook but to achieve it we had to abandon the conventional approach to scale. Optimizing for learning was the only practical path to scaling, to the fraction of people who connect through Facebook today and beyond.</p></div>
  446. </article>
  447. </section>
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  449. <p>
  450. <a href="/david/blog/">Accueil du blog</a> |
  451. <a href="https://m.facebook.com/notes/kent-beck/economy-of-scope/1041710055861858">Source originale</a> |
  452. <a href="/david/stream/2019/">Accueil du flux</a>
  453. </p>
  454. </nav>
  455. <footer>
  456. <div>
  457. <img src="/static/david/david-larlet-avatar.jpg" loading="lazy" class="avatar" width="200" height="200">
  458. <p>
  459. Bonjour/Hi!
  460. Je suis <a href="/david/" title="Profil public">David&nbsp;Larlet</a>, je vis actuellement à Montréal et j’alimente cet espace depuis 15 ans. <br>
  461. Si tu as apprécié cette lecture, n’hésite pas à poursuivre ton exploration. Par exemple via les <a href="/david/blog/" title="Expériences bienveillantes">réflexions bimestrielles</a>, la <a href="/david/stream/2019/" title="Pensées (dés)articulées">veille hebdomadaire</a> ou en t’abonnant au <a href="/david/log/" title="S’abonner aux publications via RSS">flux RSS</a> (<a href="/david/blog/2019/flux-rss/" title="Tiens c’est quoi un flux RSS ?">so 2005</a>).
  462. </p>
  463. <p>
  464. Je m’intéresse à la place que je peux avoir dans ce monde. En tant qu’humain, en tant que membre d’une famille et en tant qu’associé d’une coopérative. De temps en temps, je fais aussi des <a href="https://github.com/davidbgk" title="Principalement sur Github mais aussi ailleurs">trucs techniques</a>. Et encore plus rarement, <a href="/david/talks/" title="En ce moment je laisse plutôt la place aux autres">j’en parle</a>.
  465. </p>
  466. <p>
  467. Voici quelques articles choisis :
  468. <a href="/david/blog/2019/faire-equipe/" title="Accéder à l’article complet">Faire équipe</a>,
  469. <a href="/david/blog/2018/bivouac-automnal/" title="Accéder à l’article complet">Bivouac automnal</a>,
  470. <a href="/david/blog/2018/commodite-effondrement/" title="Accéder à l’article complet">Commodité et effondrement</a>,
  471. <a href="/david/blog/2017/donnees-communs/" title="Accéder à l’article complet">Des données aux communs</a>,
  472. <a href="/david/blog/2016/accompagner-enfant/" title="Accéder à l’article complet">Accompagner un enfant</a>,
  473. <a href="/david/blog/2016/senior-developer/" title="Accéder à l’article complet">Senior developer</a>,
  474. <a href="/david/blog/2016/illusion-sociale/" title="Accéder à l’article complet">L’illusion sociale</a>,
  475. <a href="/david/blog/2016/instantane-scopyleft/" title="Accéder à l’article complet">Instantané Scopyleft</a>,
  476. <a href="/david/blog/2016/enseigner-web/" title="Accéder à l’article complet">Enseigner le Web</a>,
  477. <a href="/david/blog/2016/simplicite-defaut/" title="Accéder à l’article complet">Simplicité par défaut</a>,
  478. <a href="/david/blog/2016/minimalisme-esthetique/" title="Accéder à l’article complet">Minimalisme et esthétique</a>,
  479. <a href="/david/blog/2014/un-web-omni-present/" title="Accéder à l’article complet">Un web omni-présent</a>,
  480. <a href="/david/blog/2014/manifeste-developpeur/" title="Accéder à l’article complet">Manifeste de développeur</a>,
  481. <a href="/david/blog/2013/confort-convivialite/" title="Accéder à l’article complet">Confort et convivialité</a>,
  482. <a href="/david/blog/2013/testament-numerique/" title="Accéder à l’article complet">Testament numérique</a>,
  483. et <a href="/david/blog/" title="Accéder aux archives">bien d’autres…</a>
  484. </p>
  485. <p>
  486. On peut <a href="mailto:david%40larlet.fr" title="Envoyer un courriel">échanger par courriel</a>. Si éventuellement tu souhaites que l’on travaille ensemble, tu devrais commencer par consulter le <a href="http://larlet.com">profil dédié à mon activité professionnelle</a> et/ou contacter directement <a href="http://scopyleft.fr/">scopyleft</a>, la <abbr title="Société coopérative et participative">SCOP</abbr> dont je fais partie depuis six ans. Je recommande au préalable de lire <a href="/david/blog/2018/cout-site/" title="Attention ce qui va suivre peut vous choquer">combien coûte un site</a> et pourquoi je suis plutôt favorable à une <a href="/david/pro/devis/" title="Discutons-en !">non-demande de devis</a>.
  487. </p>
  488. <p>
  489. Je ne traque pas ta navigation mais mon
  490. <abbr title="Alwaysdata, 62 rue Tiquetonne 75002 Paris, +33.184162340">hébergeur</abbr>
  491. conserve des logs d’accès.
  492. </p>
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