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CE 00879-3 Information Systems in Industry

CE 00879-3 Information Systems in Industry. Lecture 9 Maintaining Information Systems in Industry Delivered by Dave Thomas, K235 e: d.t.thomas@staffs.ac.uk w: www.fcet.staffs.ac.uk/dtt1. Content. What we will cover. Last time: Providing IS in Industry

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CE 00879-3 Information Systems in Industry

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  1. CE 00879-3Information Systems in Industry Lecture 9 Maintaining Information Systems in Industry Delivered by Dave Thomas, K235 e: d.t.thomas@staffs.ac.uk w: www.fcet.staffs.ac.uk/dtt1

  2. Content

  3. What we will cover • Last time: Providing IS in Industry • This time – Maintaining IS in Industry • What is ‘maintaining’? • Quality • Defining factors • Measuring • Managing • The ‘and finally’ slide • But first . . . . did you know about?

  4. What is ‘maintaining’? • Mending broken things? • Guaranteeing quality of IS service? • Keeping IS functionality in line with enterprise needs (PURs?) • Keeping IS performance in line with enterprise needs? • Ensuring IS availability on future technology platforms? • All of the above? - see ISO14764

  5. Quality • Defining factors • According to Steve McConnel in his CC2 book • External – user facing • Internal – everything else • According to Juran • Quality of design • Quality of performance • Evolved to the Deming Cycle and kaizen • Now developed into the six sigma • Have different • Expectations\Models\Approaches\Benefits\Metrics

  6. Internal Quality • Areas • Understandability • Completeness • Conciseness • Portability • Consistency • Maintainability • More Areas • Testability • Usability • Reliability • Structuredness • Efficiency • Security

  7. External Quality • Areas • Functional (ISO 9126): • Suitability • Accuracy • Interoperability • Compliance • Security • Performance • Speed • Reliability • ‘Cosmetics’ etc

  8. Metrics (measuring) • Internal Quality • Over to you! • External • Availability • Response Times • MTBF • All SLA fodder of one sort or another • Cosmetics • How?

  9. Managing • Organisational Structures • Developers divided according to enterprise area • Developers divided according to support function • Impacts • Processes • Escalation procedures • Improving quality

  10. And finally • We have covered: • What is ‘maintaining’? • Quality • Defining factors • Measuring • Managing • Known as QC, QA, QI, QM and maybe even this QC • It is up to you to relate these things (in your seminar at least)

  11. And finally a bit more • Next time: a (two hour) Seminar! • Five presentations • How to measure internal software quality • How to measure external software quality • Applying JM Duran’s philosophy to systems • The pros and cons of different structures for maintaining systems • The procedures needed to maintain ISs in an Enterprise

  12. Presentation groups • A group of developers from the IS department • A group of company investors • A group from the personnel department • A group from Dell computers • A group from ‘Accountancy Magazine’ magazine • Alles klar?

  13. PUR • Programme Update Request • A stone-age Michelinism quality control term for a request to change\enhance the functionality of an existing system • Was then usually followed by a ‘PUD’ • Also • SURs, SCRs, RFCs (in Prince2) • Etc – provide the meat of ‘user group’ meetings • back

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