In as long as mation Systems Analysis in addition to Design Chapter Contents Section A: In as long as mation Systems In as long as mation Systems in Organizations In as long as mation Systems in Organizations

In as long as mation Systems Analysis in addition to Design Chapter Contents Section A: In as long as mation Systems In as long as mation Systems in Organizations In as long as mation Systems in Organizations www.phwiki.com

In as long as mation Systems Analysis in addition to Design Chapter Contents Section A: In as long as mation Systems In as long as mation Systems in Organizations In as long as mation Systems in Organizations

Phillips, Robin, Home Page Manager has reference to this Academic Journal, PHwiki organized this Journal In as long as mation Systems Analysis in addition to Design Chapter Contents Section A: In as long as mation Systems Section B: Systems Analysis Section C: System Design Section D: Implementation in addition to Maintenance Section A: In as long as mation Systems In as long as mation Systems in Organizations Transaction Processing Systems Management In as long as mation Systems Decision Support Systems Expert Systems in addition to Neural Networks

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In as long as mation Systems in Organizations An in as long as mation system collects, stores, in addition to processes data to provide useful, accurate, in addition to timely in as long as mation An organization is a group of people working together to accomplish a goal Business Nonprofit organization Mission Mission statement In as long as mation Systems in Organizations Organizational charts depict the hierarchy of employees in an organization In as long as mation Systems in Organizations In as long as mation systems can: Automate routine tasks Solve problems Structured problem Semi-structured problem Unstructured problem Collect in addition to store internal or external in as long as mation

Transaction Processing Systems Provides a way to collect, process, store, display, modify, or cancel transactions Point-of-sale systems General accounting systems Payroll systems Order-entry / invoice systems Batch processing vs. online processing OLTP system Detail reports Transaction Processing Systems A transaction processing system (TPS) is characterized by its ability to: Collect, display, in addition to modify transactions Store transactions List transactions CLICK TO START Management In as long as mation Systems A management in as long as mation system is characterized by its ability to: Produce routine in addition to on-dem in addition to reports Provide useful in as long as mation as long as managerial activities Increase managerial efficiency Provide in as long as mation used as long as structured, routine decisions CLICK TO START

Management In as long as mation Systems Decision Support Systems Helps people make decisions by directly manipulating data, analyzing data from external sources, generating statistical projections, in addition to creating data models of various scenarios Executive in as long as mation system DSSs design decision models in addition to make decision queries Decision Support Systems CLICK TO START

Expert Systems in addition to Neural Networks Expert systems are designed to analyze data in addition to produce a recommendation, diagnosis, or decision based on a set of facts in addition to rules Knowledge base Inference engine Knowledge engineering Expert system shell Fuzzy logic A neural network uses computer circuitry to simulate the way a brain might process in as long as mation, learn, in addition to remember Expert Systems in addition to Neural Networks An expert system is characterized by its ability to: Replicate the reasoning of a human expert Work with internal or external data Produce a recommendation or decision CLICK TO START Section B: Systems Analysis System Development Life Cycle Planning Phase Project Justification Analysis Phase System Requirements

System Development Life Cycle Waterfall SDLC System Development Life Cycle Modified waterfall SDLC Iterative SDLC Planning Phase Create a Project Development Plan Project management software Joint application design (JAD)

Project Justification Usually emerges from a serious problem with the current system Michael Porter’s Five Forces model illustrates the factors that affect competition among business rivals. CLICK TO START Project Justification An organization must be able to: Make improvements Change the industry Create new products The PIECES framework helps classify problems in an in as long as mation system Project Justification Development methodologies Structured methodology In as long as mation engineering methodology Object-oriented methodology Rapid application development

Analysis Phase Produce a list of requirements as long as a new or revised in as long as mation system Analysis phase activities Study the current system Determine system requirements Write requirements report Analysis Phase System Requirements Criteria as long as successfully solving problems identified in an in as long as mation system Success factors A CASE tool can: Document system requirements Diagram current in addition to proposed in as long as mation systems Schedule development tasks Develop computer programs

Phillips, Robin Arizona Republic Home Page Manager www.phwiki.com

System Requirements CASE tools help project team members manage all the details of system documentation. In this example, the project team is defining fields as long as the Inventory object depicted on the diagram. CLICK TO START System Requirements A System Requirements Report describes the objects as long as an in as long as mation system Section C: System Design Design Phase Evaluation in addition to Selection Application Specifications

Design Phase The project team must figure out how the new system will fulfill the requirements in the specified in the System Requirements Report Design Phase Consider the following when evaluating hardware alternatives Level of automation in addition to computerization Processing methodology Centralized processing Distributed processing Network technology Design Phase Software alternatives Programming language Application development tool Commercial software Turnkey system

Maintenance Phase Maintenance phase costs

Phillips, Robin Home Page Manager

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