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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

Does RE Apply to Open Source Development?

A requirements person's view

Ian Alexander

http://www.scenarioplus.org.uk


Cathedral vs bazaar
Cathedral vs Bazaar

Classical Software Development

or

Open Source

O'Reilly, 2001


Cathedral vs bazaar1
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


Cathedral vs bazaar2
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


Re for osd
RE for OSD?

  • How to compare RE processes?

  • Three kinds of Software Development

  • What is Distinctive about OSD?


How to compare re processes
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 …



Complementary elements collaborative contexts
Complementary Elements, Collaborative Contexts


2 three kinds of software development
2. Three kinds of Software Development

A) Large-Scale Custom Development


2 three kinds of software development1
2. Three kinds of Software Development

B) Open Source

* = informal


2 three kinds of software development2

www.nokiamuseum.com

2. Three kinds of Software Development

C) Managing a Product Line



Re for osd1
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


Future of re for osd
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


Scenario plus
Scenario Plus

  • Requirements Training

  • Consultancy

  • Workshop Facilitation

    www.scenarioplus.org.uk


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