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END USER COMPUTING Critical Issues
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Key Issues in IS Management Neiderman, Brancheau, Wetherbe, MISQ, 1991(Gray, et. al.)
Developing an information architecture Making effective use of data Improving IS strategic planning Recruiting, and developing human resources Facilitating organizational learning and use of IS Building a responsive IT infrastructure Aligning IS with the enterprise Using IS for competitive advantage Improving the quality of software development Developing telecommunications systems
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Types of Information Systems Sprague & Watson, DSS for Management, Prentice Hall, 1996
Type I (Procedure) High volume Low transaction cost Well structured Measurable Process & efficiency Data Clerical Type II (Goal) Low volume High trans. value Poorly structured Hard to measure Goal & effectiveness Concepts Mgrs, professionals
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IS Development Approaches
Systems Development Life Cycle Information Center (DSS) Object and Component
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Type I Large Systems Intercommunications among applications
Formal methodologies CASE technologies Purchased products Outsourcing
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Type I SDLC Type I systems Large and Costly Cost justified
Formal stages of evaluation Stages carefully reviewed and formally approved Data, Process, Communications
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Type II Information Center (DSS)
Type II systems Relatively small and inexpensive Value justified Prototyping and evolutionary design Data, Dialog, Model
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End User Computing (EUC)
End User Computing refers to systems in which the user does some of the programming. Arises from: Capacity of Computers Cost of Hardware Friendly Software Data Communications
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EUC Issues Data extraction (warehouses) and availability
System design and development Management and control New technologies: EIS, GDSS and Artificial Intelligence, Expert Systems and Groupware
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Prototyping & Iterative Design
Data Trial Solution User Experimentation Revised Solution
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Object Oriented (Event Driven)
User owned Small and experimental Dialog driven, reusable code Combines data and process
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Object Issues Reliability of tools and software Design methodologies
Standards and portability Extent of value
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Type I Design Systems Development Life Cycle: Formal development of systems in progressively detailed stages Initial investigation Feasibility General design Detailed design Implementation Maintenance
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Type I Design:
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Type II Design DATA MODEL DIALOG USER
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Development Roles User Intermediary (Chauffeur) Builder
Technical Support Toolsmith
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Design Philosophy Functional Entity Dialogue Event
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Distributed Management
Business within a business IS internal partnerships Virtual organizations Outsourcing and consultants Personnel management
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Ownership Data Process User Owned IS Owned
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Information Access: IT User Partnership
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