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Does RE Apply to Open Source Development?

Does RE Apply to Open Source Development?. A requirements person's view Ian Alexander http://www.scenarioplus.org.uk. Cathedral vs Bazaar. Classical Software Development or Open Source. O'Reilly, 2001. Cathedral vs Bazaar. Classical SW Development

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Does RE Apply to Open Source Development?

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  1. Does RE Apply to Open Source Development? A requirements person's view Ian Alexander http://www.scenarioplus.org.uk

  2. Cathedral vs Bazaar Classical Software Development or Open Source O'Reilly, 2001

  3. Cathedral vs Bazaar Classical SW Development • shaped / scarred by "the software crisis" • deliberate, thorough, carefully documented • "carefully crafted by individual wizards or small bands of mages working in splendid isolation" Eric Raymond

  4. Cathedral vs Bazaar Open Source • shaped / scarred by painful experience of closed software, strict hierarchy, slow response • "a great babbling bazaar of differing agendas and approaches" Eric Raymond

  5. RE for OSD? • How to compare RE processes? • Three kinds of Software Development • What is Distinctive about OSD?

  6. How to compare RE processes? • Al Davis: • 201 Principles of Software Development ! • Kotonya & Sommerville: • a set of "Requirements Engineering Processes" • Beyer & Holtzblatt: • Contextual Design (5 major processes) • … etc … • … etc …

  7. Competing RE Processes?

  8. Complementary Elements, Collaborative Contexts

  9. 2. Three kinds of Software Development A) Large-Scale Custom Development

  10. 2. Three kinds of Software Development B) Open Source * = informal

  11. www.nokiamuseum.com 2. Three kinds of Software Development C) Managing a Product Line

  12. 3. What is Distinctive about OSD?

  13. RE for OSD? • Parallels with product line RE • Distinctively informal • Evolution by natural (market) selection • Successes, eg Mozilla • Can be commercial (eg Linux) • Origins: introspection not elicitation • assumes user is like developer • less true as usage widens

  14. Future of RE for OSD • Wider market, more commercial • More need for discovering requirements • Heavily-structured RE "not any time soon" • But, will need clear requirements to work from

  15. Scenario Plus • Requirements Training • Consultancy • Workshop Facilitation www.scenarioplus.org.uk

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