The Pursuit Of Defect Reduction

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Software Quality is given low priority. This presentation shows how early implementation will decrease the number of software defects

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The Pursuit Of Defect Reduction

  1. 1. Wesley Nitsckie Marlon Parker
  2. 2. Agenda
  3. 3. Background <ul><li>“ I’d rather have it wrong than have it late. We can always fix it later” </li></ul>Background
  4. 4. Introduction <ul><li>Software is part of everyday life </li></ul><ul><li>High costs associated with poor quality </li></ul><ul><li>Software quality assurance has been given a low priority in SDLC </li></ul>Introduction
  5. 5. Software Quality <ul><li>What is software quality? </li></ul><ul><ul><li>Measures how well software is designed ( quality of design ) </li></ul></ul><ul><ul><li>How well the software conforms to that design ( quality of conformance ) </li></ul></ul><ul><ul><li>Fitness for use </li></ul></ul>Software Quality
  6. 6. <ul><li>Case: Mobile messaging company </li></ul><ul><ul><li>Pilot Study </li></ul></ul><ul><ul><li>Landscape </li></ul></ul><ul><ul><ul><li>Semi-structured interviews </li></ul></ul></ul><ul><ul><ul><li>Identify stakeholders, SDLC processes, organisational flows </li></ul></ul></ul><ul><ul><li>2 Software development Projects </li></ul></ul><ul><ul><ul><li>Project A – QA at the end of SDLC process </li></ul></ul></ul><ul><ul><ul><li>Project B – QA throughout the SDLC process </li></ul></ul></ul><ul><ul><ul><li>Comparison of metrics </li></ul></ul></ul>Research Methodology
  7. 7. Project A Research Methodology
  8. 10. Project B Research Methodology
  9. 14. <ul><li>Project A: </li></ul><ul><ul><li>Defects reported was 17 and took 4 days to fix. </li></ul></ul><ul><li>Project B: </li></ul><ul><ul><li>Defects reported was 3 and took 3 hours to fix. </li></ul></ul><ul><li>Difference in time </li></ul><ul><li>Cost implications </li></ul><ul><li>Number of defects was reduced </li></ul>Discussion of Findings
  10. 16. <ul><li>Spend more time fixing than developing </li></ul><ul><li>QA early in SDLC reduces software defects and costs </li></ul><ul><li>QA does not eliminate defects completely </li></ul><ul><li>QA should be woven through the fabric of the SDLC </li></ul>Conclusion
  11. 17. <ul><li>Thank you </li></ul>The End

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