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Unformatted text preview: ng – Users must have suﬃcient control over design process to ensure that system reﬂects their business priori6es and informa6on needs – Insuﬃcient user involvement in design eﬀort is major cause of system failure • • Users provide input into what the system will look like and how it will func6on Sample Design Speciﬁca6ons OUTPUT Medium Content Timing INPUT Origins Flow Data entry USER INTERFACE Simplicity Efficiency Logic Feedback Errors DATABASE DESIGN Logical data model Volume and speed requirements File organization and design Record specifications PROCESSING Computations Program modules Required reports Timing of outputs MANUAL PROCEDURES What activities Who performs them When How Where CONTROLS Input controls (characters, limit, reasonableness) Processing controls (consistency, record counts) Output controls (totals, samples of output) Procedural controls (passwords, special forms) SECURITY Access controls Catastrophe plans Audit trails DOCUMENTATION Operations documentation Systems documents User documentation CONVERSION Transfer files Initiate new procedures Select testing method Cut over to new system TRAINING Select training techniques Develop training modules Identify training facilities ORGANIZATIONAL CHANGES Task redesign Job redesign Process design Organization structure design Reporting relationships • Produced by Dr. Brian Janz • 9 Systems Implementa6on • Programmin...
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- Spring '11