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Unformatted text preview: CS359 TEST #1 SDLC Terms / Concepts Management Concepts ( Possible Essay Questions) • Evolution to the information age • Computing in Small Business • Definition of information system Systems: • Strategic • Management • Operational Systems • Functional Obsolescence • Operational Obsolescence Responding to functional and operational obsolescence: • systems “live” in an environment • organic systems change due to aging • mechanical systems change due to wear and tear • an information system’s effectiveness degrades because of the evolving environment System Development Life Cycle: Analysis, Design, Development, Implementation, Maintenance & Review SDLC components: • People, all systems respond to the needs of people even those which appear to be “automatic” systems Procedures, there are “standard” approaches to most system behaviors that are grounded in law or profession Software, most of the “tailoring” of systems occurs in the software where machines are directed to act in user desired ways Hardware, although many systems do not require computers, most information intensive systems do Data • data is the chaff from which information is derived • computers excel at storing and retrieving data gathering and safeguarding the data • users need to achieve their goals is a key to system definition Networks networks connect systems to systems and users Analyst as: • Change Agent ( positive for those who desire change else negative) , Problem Solver ( a practical user of methods and tools) , Group Facilitator ( a diplomat, a communicator, a momentum builder, a dam breaker, a system advocate) The Role of Technology: • Methodologies, Tools and Techniques -- CASE Tools Computer Assisted Systems Engineering • Analysis • data flow diagramming • system diagramming • entity-relationship diagramming • object modeling with UML • Design • input screen design • report design • structure charting • prototyping • Development • code generation • prototyping • Implementation • documentation • Maintenance • reverse engineering • Client/Analyst relationship in the SDLC- User involvement enhances the SDLC’s effectiveness IS Requirements: • Relevance, Accuracy, Timeliness, Usability, Affordability, Adaptability • Symptom - Problem - Solution (systems approach to problem solving): • Symptoms: experience of user is unsatisfactory • Problem: system lacks user synchronization • Solution: realign system functions with user needs • Source Data Input In-efficiencies - Subsystem Integration Breakdown • capture • edit • input • process • output • evaluate Breakdowns in Subsystem Integration • functions require specific data • data collected for one function may not serve another well • “piggy-back” information use saves data entry and improves data accuracy and timeliness • multiple tools may require “converters” to pass data from one to another • Problem Understanding Resources...
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This test prep was uploaded on 04/07/2008 for the course CS 359 taught by Professor Wagspack during the Spring '08 term at Bentley.
- Spring '08