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Network Development Life Cycle: Success Factors and Implementation Phases

This chapter covers the critical success factors and phases involved in the network development life cycle, including analysis, design, and implementation. Key topics include LAN, voice design, and user identification. Decision-making processes, feasibility studies, and documentation are emphasized throughout. The text encourages honesty, learning from mistakes, and understanding user needs. Practical tools and techniques for analysis, design, and simulation are explored. The importance of detailed proposals, outsourcing considerations, and criteria for selecting solutions are also discussed.

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Network Development Life Cycle: Success Factors and Implementation Phases

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  1. Chapter 12The Network Development Life Cycle • Critical success factors • Analysis and Design • Implementation • LAN • Voice Design

  2. Critical Success Factors • Identification of all potential users • Political awareness • Buy-in • Communication • Detailed project documentation • Process/product awareness • Be honest with yourself

  3. Attitude • If it isn’t broken, don’t fix it • Baseline data • Learn from other’s mistakes • Don’t be afraid to admit mistakes

  4. Analysis and Design Phases • Request • Feasibility Study • Analysis (requirement) • Alternatives (cost and benefit) • Design • Selection • Cost • Documentation • Management approval

  5. Implementation Phases • Purchasing and vendor agreement • Installation • Training, and testing • Conversion • Follow up

  6. Request • Source • User • Senior managers • Communication department • external environment • Form: formal or informal • Evaluation criteria • Prioritization (costs & benefits analysis) • Outcome: approval, deny, or on hold by management

  7. Feasibility Study • Identify business objectives, functional areas, processes • Team • User, specialist, and management • Problems • Technical or non-technical • Analysis (technical, operational, economical, legal, schedule) • Report and presentation • Go or stop

  8. Analysis • Geographic requirement (scope) • Traffic load analysis • Payload type • Peak load & average load (no. of message and length) • National & international busy hour • Traffic flow pattern by individual location (map) • Response time, reliability, & availability (cost) • Security • Protocol • Circuit analysis and configuration alternatives • Network hardware analysis and alternatives • Growth • Constraint: time, cost, and compatibility

  9. Analysis Documentation • Input-process-output model (hardware configuration) • Traffic analysis report • Circuit configuration alternatives diagrams (bandwidth)

  10. Design • Hardware & software requirement • Circuit design diagram • Performance • Routing time (peak and average) • Response time (peak and average) • Delay consideration (queue) • Communication service requirement • Personal requirement • Other facilities

  11. Analysis & Design Tools Selection • Tariff databases • Response time calculation • Multiple transport protocols • Multiple topologies • Circuit design • Financial • Input/output • Operating platforms • Product library • Design validation

  12. Simulation Tools Selection • Network type • Network scope • Network services • Network devices • Network protocols • Data traffic attributes: bursty, batch, real-time • Traffic data entry • User interface • Presentation: performance or math calculation

  13. Final Proposal • Contents: • Budget • Timetable • Project detail: analysis & design • Formal presentation (sell) • Stop or go: in-house or outsourcing

  14. Outsourcing • Request for proposal (RFP) or request for quotation (RFQ) • Selection criteria and its weight

  15. Request for Proposal • Title • Table of contents • Description of organization • Problem definition • Operation requirements • Format of response • Evaluation criteria • Decision schedule • References

  16. Description of Organization • Organization chart • Organization locations • Overview of system

  17. Problem Definition • Performance • throughput • Response time • Error rate • Misrouting • Security

  18. Operation Requirements • Reliability • Down time • Misrouting • Lost message • Transmission error • Performance • Throughput • Response time • Error rate • Misrouting

  19. Format of Response - I • Title • Table of contents • Overview • Software • Hardware • Performance (future growth) • Site requirement • Conversion (installation, testing, & schedule)

  20. Format of Response - II • Maintenance (support) • Costs • Warranty Coverage • User Training • References • Other related information

  21. Selection criteria • Proposed solution -percent-of-fit goal • Compatibility • Security and backup • Price • Technical support • Product maintenance • Repair service • Financial viability

  22. Documentation • Diagrams and maps • Configuration and wiring • Components list • Hardware: model and specification • Software: version, release, no. of copies • Implementation plan (Gantt chart) • activities • Schedule

  23. Management Approval • Review and verification • Users • Operators • Management: budget

  24. Implementation • Purchasing • Testing • Training • Conversion

  25. Purchasing • Vendor agreement • Equipment configuration specification • Acceptance test • Schedule: delivery, installation, testing, operation • Location: delivery, installation, testing, operation • Other terms and conditions: payment, warranty, maintenance • Get a experienced lawyer

  26. Training • Types of instruction • Classroom • Hand on • In house • Outside • Educating • Users • Operators • Maintenance crew • Security and backup

  27. Testing • Testing time • Testing Tools • Software & hardware • IBM’s Telecommunication Network Simulator • Testing areas • Performance • Stress testing (load) • Error handling • Error recovery procedures

  28. Conversion • Types • Parallel • Cut over • Pilot • Piece by piece • Help desk • Vendor technicians or consultants

  29. LAN Design • Number of nodes • Usage • Traffic: day and time • Disk storage • Speed • Security and backup • Compatibility • Management

  30. Voice Network Design • Peak load and average load • Holding time • Overdesigning or delay • Number of circuits • Queuing capability

  31. Assignment • Review chapters 8-12 • Read chapter 13 • Work on individual & term project

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