Ch07

CASE Tool Evolution 1980 1984 1987 1990 Computer-aided documentation Computer- aided diagramming Analysis and design tools Automated design analysis Automated central repository Automated code generation Linked design automation Intelligent methodology drivers Reusable code libraries

CASE Tool Components Central Repository Process Modeling Tools Detailed Analysis Tools Transformation Tools Database/Application Design Tools Application Generation Tools

CASE Tool Repository Central Repository Project Documentation Form and Report Layouts Logical Model Diagrams Program Source and Object Code Detailed Analysis Findings General Project Information Data Element Specifications Reusable Code Libraries

Large-Scale JAD Environments Management Deliberation Center Defense Systems Management College Fort Belvoir, VA Air Force Innovation Center Pentagon Washington, D.C. Glensidige Insurance Oslo, Norway Center for Performance Improvement Soza and Company, Ltd. Fairfax, VA

SDLC versus RAD Preliminary Investigation Analysis Logical Design Physical Design Implementation Maintenance Requirement Planning User Design Construction Cutover Traditional SDLC RAD Life Cycle

RAD Reduces Time 2 4 6 8 10 12 14 16 18 20 22 24 26 Project Months RAD Reduces Time Requirements Planning User Design Construction Cutover Traditional SDLC 8 7 6 5 4 3 2 1 E f f o r t

Comparative Software Development Costs Product Cost $ Effort (man years) Lines of Code Lotus 1-2-3 V 3.0 22,000,000 263 400,000 NASA Space Shuttle 1,200,000,000 22,096 25,600 2000 Lincoln Continental 2,800,000 37 93,500 Modern Automatic Teller Machine 13,200,000 150 780,000 IBM Retail Checkout Scanner 3,000,000 58 90,000

CASE Tool Adoption Objectives  Create development process standards  Improve overall application quality  Decrease design time and improve time to market  Decrease required effort and time in application testing  Encourage integration of development projects  Improve effectiveness of project management activities  Decrease required effort and time in application maintenance activities  Promote organization-wide reusable program code  Improve portability of applications across platforms and operating environments

Good and Bad News The Good News The Bad News ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Common JAD Session Tasks ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RAD Activities and Deliverables Requirements Planning User Design Construction Cutover Primary Activity Model and prototype requirements Model and prototype design Complete application development Install application Data Conversion Define data requirements Plan and design data conversion Develop data conversion modules Implement conversion plan Testing Design application test plan Conduct user testing End-user Training Define training requirements Design training plan Produce training materials Conduct end-user training

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Ch07