1. 1 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Information Systems Development – The System Approach 1. “System thinking” 2. Alternative solutions -> choose a solution 3. Design solution 4. Implement solution 5. Evaluate

2. 2 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. The System Development Cycle  Investigation  Analysis  Design  Implementation  Deployment  Maintenance

3. 3 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Implementation & Other Activities System Testing Deployment

4. 4 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Other System Development Activities  Testing is not an After-thought!  Documentation  Training  Deployment: Conversion  Parallel  Phased  Pilot  Big Bang (Direct Cut-over, Plunge)  Maintenance

5. 5 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Alternatives: Prototyping The prototyping process

6. 6 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Alternatives: End User Development

7. 7 McGraw-Hill/Irwin Copyright © 2004, The McGraw-Hill Companies, Inc. All rights reserved. Alternatives: External Development  Application software packages  Request for Proposal (RFP) or Request for Quotation (RFQ) / Selection  Customization  Outsourcing – using IS services  How to evaluate: HW SW Services