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Requirements Documentation

Requirements Documentation. Colin Potts Georgia Tech. Customer- and developer-oriented documentation. Post-requirements traceability. Requirements. derived from. Test cases. meets. passes/fails. Implementation. Pre- and post-requirements traceability in AIMS. Requirements. meets.

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Requirements Documentation

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  1. Requirements Documentation Colin Potts Georgia Tech

  2. Customer- and developer-oriented documentation

  3. Post-requirements traceability Requirements derived from Test cases meets passes/fails Implementation

  4. Pre- and post-requirements traceability in AIMS Requirements meets derived from Specification Test cases meets Detailed design passes/fails meets Implementation

  5. Input: CoWorker record in which blah = 1, and ... Expected output: blah = 2 1.1 The system shall blah, blah... 1.2 If the co-worker is blah, blah, the system shall inform the user ... 1.2.1... if !(fizzwick(cw)) { for (i=0;i=max;i++) update(cw, i); ... else ... Traceability (cont). Reqt Test case .... Code

  6. Documentation standards • Common document standards exist • e.g IEEE 830 (Software Reqts. Specs.)

  7. AIMS Documentation structure • Reqts. definition

  8. AIMS Documentation structure • Specification & design

  9. AIMS Documentation structure • Functional reqts./app. overview/det. design

  10. Documentation and models • Models are formal representations (usually graphical) of the HAS or product • e.g. interaction, data flow, entity-relationship diagrams • Should models be produced with or after reqt. documentation? Customer- oriented Developer- oriented Models Option 1 Customer- oriented Developer- oriented Option 2 Models

  11. Customer-oriented Unambiguous In customer’s language Complete with respect to intent Developer-oriented Technically precise Consistent Complete specifications Feasible Testable Qualities of requirements documents • Both • Clear • Unambiguous • Free of “gold plating”

  12. Informal reviews Purpose: Critique and improve requirements When: Incrementally & throughout Who: Interested parties Formal reviews Purpose: Approve requirements and authorize project When: When reqts. docs. are complete Who: Owner (in SSM terms) Requirements reviews & inspections

  13. Class exercise: Requirements critique • Take the requirements document • Individually read several paragraphs carefully, looking for ambiguities • As a class, discuss: • general quality • specific issues • recommend reformulation of reqts.

  14. Requirements documentation: how to find out more • Example standards • Contained in Dorfman & Thayer’s “green” tutorial • Heavy systems engineering & DOD emphasis • IS organizations will want to water down many of these guidelines

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