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Software Development

Software Development. Systems Development Life Cycle. What is the SDLC?. Used by every software developer in some form Encompasses different development styles Is client-focused Based on ‘getting it right’. Who is Involved?.

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Software Development

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  1. Software Development Systems Development Life Cycle

  2. What is the SDLC? • Used by every software developer in some form • Encompasses different development styles • Is client-focused • Based on ‘getting it right’

  3. Who is Involved? • Best case – The client, an analyst, a project manager, a designer, a developer • Industry – The client, a manager, developers (& possibly a designer)

  4. Stages of the SDLC • Investigate • Design • Develop / Test • Implement • Support • Evaluate • START AGAIN!

  5. Methods of Development:The Waterfall Method • Used mostly in academic projects • Steps through each process in the SDLC in turn What are the drawbacks?

  6. Methods of Development:The Spiral Method • Used in industry for project with ‘unknowns’ • Any stage may be revisited at any time to alter the client’s requirements What are the drawbacks?

  7. Methods of Development:Agile Development (or RAD) • Used in most industry projects • Creates alliance between client and developer • Focused on delivering in bug free ‘modules’ Why is this used in industry?

  8. What is Feasibility? • Every computing project should have a feasibility study included. • This is an initial analysis to determine whether the project is feasible within the constraints placed upon it. What constraints could be placed on a computing project?

  9. Feasibility

  10. What is involved in Feasibility? • Can you actually build this? • What are the constraints of your project (TOES!) • Can your client implement & use this? • Can your client afford this? (if not, you don’t get paid!) • Can you complete this (and your report) by the deadline? In here, plan out your work using a timetable or Gantt Chart

  11. Investigations • If the project is feasible, first get your facts right! • Fact finding: • Questionnaires • Observation • Data Gathering • Interviews Can I read my client’s mind??

  12. System Requirements • User interface requirements • Processing requirements • Storage requirements • Control Requirements

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