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31 Cards in this Set
- Front
- Back
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Systems Analysis and Design Step-by-step process for developing high-quality information systems |
Systems Analysis and Design |
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What Does a Systems Analyst Do? |
Plan, develop, and maintain information systems |
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COMPONENTS OF INFORMATION SYSTEM |
Hardware Software Data Process People |
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Is the physical layer of the information system Moore’s Law |
Hardware |
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System software Application software |
Software |
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Tables store data Linked tables work together to supply data |
Data |
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Describe the tasks and business functions that users, managers, and IT staff members perform to achieve specific results |
Processes |
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Stakeholders Users or end users |
People |
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Business in the 21ˢᵗ Century |
E-commerce or I-commerce B2C (Business-to-Consumer) B2B (Business-to-Business) |
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Primary business depends on the Internet rather than a traditional business channel |
Internet-dependent firms |
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Have physical stores where customers can see and touch the products |
Brick-and-mortar firms |
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Overview of a company’s mission, functions, organization, products, services, customers, suppliers, competitors, constraints, and future direction |
Business Profiles |
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Specific set of transactions, events, and results that can be described and documented |
Business Processes |
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Enterprise computing systemsTransaction processing systemsBusiness support systemsKnowledge management systemsUser productivity systems
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A new set of system definition |
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Information systems that support company-wideoperations and data management requirementsExamples:Wal-Mart’s inventory control system |
Enterprise Computing |
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Transaction processing (TP) systems process data generated by day-to-daybusiness operationsExamples:Customer order processing |
Transaction Processing |
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Uses a large database called a knowledge base Allows users to find information by entering keywords |
Knowledge Management |
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Technology that improves productivity |
User Productivity |
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Most large companies require systems thatcombine transaction processing, businesssupport, knowledge management, and userproductivity features |
System Integration |
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Business modelRequirements modelData modelObject modelNetwork modelProcess model
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Modeling |
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Important decisions might be made too early,before business or IT issues are thoroughlyunderstood |
Prototyping |
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Computer-Aided Systems Engineering (CASE) Tools |
Provide an overall framework for systems |
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Traditional method for developing systems Organized into phases |
Structured Analysis |
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More recent method for developing systems Objects represent actual people, things, or events |
Object-Oriented Analysis |
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Latest trend in software development |
Agile/Adaptive Methods |
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The SDLC model usually includes five steps |
Systems Planning Systems Analysis Systems Design Systems Implementation Systems Security and Support |
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Systems request – begins the process and describes problems or desired changes |
Systems Planning |
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Build a logical model of the new system |
Systems Analysis |
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Create a physical model that satisfies all documented requirements |
Systems Design |
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New system is constructed Programs are written and tested |
Systems Implementation |
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A well-designed system must be secure, reliable, maintainable, and scalable |
Systems Support and Security |
