Chapter 12 The Network Development Life Cycle

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