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26 Cards in this Set
- Front
- Back
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Why Is Systems Development Difficult and Risky?
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The Difficulty of Requirements Determination, Changes in Requirements, Changing Technology, Diseconomies of Scale
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How Is System Definition Accomplished?
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define system goals and scope, assess feasibility, form a project team
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What is the Users' Role in the Requirements Phase?
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to determine specific features, cheapest easiest, phase requires interviewing
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How are the Five Components Designed?
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* Each of five components are designed in this stage
* Accurate requirements are critical here; if incomplete or wrong they will be poor guides for evaluation * Design tasks pertain to each of the five IS components |
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how is an information system implemented?Â
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* tasks are to build, test, and convert users to the new systems
* they obtain, install, and test hardware |
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What are some of the problems with the SDLC?
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1. SDLC Waterfall
2. Requirements documentation difficulty 3. Schedulign & Budget difficulties |
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Systems Development
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process of creating and maintaining information systems
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Brooks' Law
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adding more people makes a late project later
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System Development Life Cycle (SDLC)
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traditional process to develop IS
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Business Analyst
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specialize in understanding business needs, strategies, goals, and helping businesses implement systems
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Systems Analyst
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IT professionals who understand businesses and technology
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Product Quality Assurance
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testing of products to ensure quality
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Beta Testing
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process of allowing future system users to try out new system on their own
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Pilot Installation
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entire system on part/section of company
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Phased Installation
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new system installed in phases across entire organization
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Parallel Installation
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new system runs alongside old one until it is fully operations
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Plunge Installation
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shuts off old system in favor of new one
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Patch
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fixes for high-priority failures
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Service Packs
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group of fixes for bundle of low-priority failures
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Why is systems development difficult and risky
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determining requirements, change them, scheduling, budgeting, technology, dieseconmies of scale
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Cost feasibility refers to what
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assessment of cost of a project
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Schedule feasibility
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difficult to determine hard to estimate time it will take to build the system
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technical feasibility
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to whether existing info technology is likely to be able to meet the needs of a new system
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organizational feasibility
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is whether the new system fits within the organization's customs, culture, charter, or legal requirements
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system maintenance refers to what
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record requrests for change, piortize requests, fix failures
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Waterfall is a problem with
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SDLC
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