Chapter 12 The Network Development Life Cycle

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Chapter 12The Network Development Life Cycle

• Critical success factors
• Analysis and Design
• Implementation
• LAN
• Voice Design

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Critical Success Factors

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

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Attitude

• If it isnt broken, dont fix it
• Baseline data
• Learn from others mistakes
• Dont be afraid to admit mistakes

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Analysis and Design Phases

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

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Implementation Phases

• Purchasing and vendor agreement
• Installation
• Training, and testing
• Conversion
• Follow up

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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

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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

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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

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Analysis Documentation

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

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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

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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

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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

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Final Proposal

• Contents
• Budget
• Timetable
• Project detail analysis design
• Formal presentation (sell)
• Stop or go in-house or outsourcing

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Outsourcing

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

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Request for Proposal

• Title
• Table of contents
• Description of organization
• Problem definition
• Operation requirements
• Format of response
• Evaluation criteria
• Decision schedule
• References

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Description of Organization

• Organization chart
• Organization locations
• Overview of system

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Problem Definition

• Performance
• throughput
• Response time
• Error rate
• Misrouting
• Security

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Operation Requirements

• Reliability
• Down time
• Misrouting
• Lost message
• Transmission error
• Performance
• Throughput
• Response time
• Error rate
• Misrouting

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Format of Response - I

• Title
• Table of contents
• Overview
• Software
• Hardware
• Performance (future growth)
• Site requirement
• Conversion (installation, testing, schedule)

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Format of Response - II

• Maintenance (support)
• Costs
• Warranty Coverage
• User Training
• References
• Other related information

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Selection criteria

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

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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

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Management Approval

• Review and verification
• Users
• Operators
• Management budget

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Implementation

• Purchasing
• Testing
• Training
• Conversion

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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

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Training

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

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Testing

• Testing time
• Testing Tools
• Software hardware
• IBMs Telecommunication Network Simulator
• Testing areas
• Performance
• Stress testing (load)
• Error handling
• Error recovery procedures

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Conversion

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

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LAN Design

• Number of nodes
• Usage
• Traffic day and time
• Disk storage
• Speed
• Security and backup
• Compatibility
• Management

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Voice Network Design

• Peak load and average load
• Holding time
• Overdesigning or delay
• Number of circuits
• Queuing capability

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Assignment

• Review chapters 8-12
• Read chapter 13
• Work on individual term project