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IS Design and Use

IS Design and Use. LECTURE 8. Information Systems Department. Issues Related to IS Design and Use. To be Covered: Cost Speed Complexity Technology and Innovation Alignment on Objectives Adoption Useful Life. Cost Two components to the total costs:.

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IS Design and Use

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  1. IS Design and Use LECTURE 8 Information Systems Department

  2. Issues Related to IS Design and Use • To be Covered: • Cost • Speed • Complexity • Technology and Innovation • Alignment on Objectives • Adoption • Useful Life

  3. CostTwo components to the total costs:

  4. Unnecessary works arises from two main sources: • Gold Plating.. • Tendency of users to demand extras- features that they want but don’t add extra value to the system • The worse, is that developers accepting these extras because they look easy and small. • In fact, every time you add a feature, you add to the complexity of the system and to the cost

  5. Unnecessary works arises from two main sources: • Rework.. • It is necessary when you make an error and have to correct it. • If you catch and correct the error right away -- No great damage is done. • If it is not discovered until testing, other work that depends on it, has to be scrapped and redone. • Requirements or architecture error that is discovered in testing costs 1000 times than if it is caught right away • Testing takes up about 50% of total initial development cost just in correcting errors. • 29% of system projects failed before implementation and scrapped with a rework cost of 100%

  6. Speed

  7. Complexity

  8. Complexity • Emergent Properties of Complexity theory: • Just because you are content with designing and coding the software. • It is not enough for you to use the system directly. • When you made a change, you should test all components in test cycle to ensure they work as before

  9. Technology and Innovation • The main drivers of IS development is to exploit Technological Innovation to change & improve the way the business is done

  10. Technology and Innovation

  11. Alignment on Objectives

  12. Adoption

  13. Useful Life • Another issue is how to plan for a system useful life? • Importance of planning 1. To determine whether a new system is worthwhile or not - e.g. a system cost SR 5 million & bring in SR 1 million/annum, Then, the system must have a useful life of at least 5 years.

  14. Useful Life • Importance of planning 2. To decide how and when to withdraw or replace the system. - Most development projects do not address the issue of decommissioning at all. - As a result, systems live for much longer than anyone would have imagined

  15. DONE  Design is more than choosing nice front Thank you for listening

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