Chapter 14

Network Design and Implementation

Agenda

• Analysis and Design

• Implementation

• LAN

• Voice Network Design

Analysis and Design Phases

• Request

• Feasibility Study

• Analysis (requirement)

• Alternatives (cost and benefit)

• Design

• Selection

• Cost

• Documentation

• Management approval

Implementation Phases

• Purchasing and vendor agreement

• Installation

• Training, and testing

• Conversion

• Follow up audit

Request

• Source– User

– Senior managers

– Communication department

– External environment (customer, government, etc.)

• Form: formal or informal• Prioritization (costs & benefits analysis)• Outcome: approval, deny, or on hold by

management

Feasibility Study

• Team– User, specialist, and management

• Problems– Technical or non-technical

• Analysis (technical, operational, economical, legal, schedule)

• Report and presentation

• Go or stop

Analysis

• Analysis items– Geographic requirement (scope)– Traffic load analysis

• Peak load (no. of message and length)• National & international busy hour

– Traffic flow pattern by individual location (map)– Response time, reliability, & availability (cost)– Terminal operators (end users & their education

background and needs)– Capacity growth projection (6 months to 5 years)– Constraint: time, cost, and compatibility

• Documentation and reports

Alternatives

• Sources (vendors)

• Availability (enchancements or new products)

• Incompatibility issues

• Costs/services trade off

Design

• Items– Configuration diagram– Routing time (peak and average)– Response time (peak and average)– Delay consideration (queue)

• Simulation– What if for routing, response, and delay

Selection Procedures

• Request for proposal (RFP) or request for quotation (RFQ)

• Selection criteria and its weight

Request for Proposal

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

Description of Organization

• Organization chart

• Organization locations

• Overview of system

Problem Definition

• Error rate

• Misrouting

• Time consuming

• Security

Operation Requirements

• Reliability– Down time– Misrouting– Lost message– Transmission error

• Performance– Throughput– Response time– Error rate

Format of Response - I

• Title

• Table of contents

• Overview

• Software (function & feature)

• Hardware (function, feature, & capacity)

• Performance (future growth)

• Site requirement

• Conversion (installation, testing, & schedule)

Format of Response - II

• Maintenance (support)

• Costs

• Warranty Coverage

• User Training

• References

• Other related information

Selection criteria

• Proposed solution

• Compatibility

• Security and backup

• Price

• Technical support

• Product maintenance

• Repair service

• Financial viability

Vendor Response to RFP - I• Introduction

• Executive summary

• Table of contents

• System design

• System feature

• Growth capacity

• Installation and testing methods

• Maintenance arrangements

• Ongoing support

• Installation schedule

• Pricing and timing of payments

• Warranty coverage

• Training and education

• Other Recommendation

Documentation• Diagrams and maps

– Configuration and wiring

• Components list– Hardware: model and specification

– Software: version, release, no. of copies

• Implementation plan (Gantt chart)– Milestones

– Activities

– Schedule

Management Approval

• Review and verification– Users– Operators

• Management: budget

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

Training

• Types of instruction– Classroom– Hand on– In house– Outside

• Educating– Users– Operators– Maintenance crew

• Security and backup

Testing

• Testing time

• Testing Tools– Software & hardware– IBM’s Telecommunication Network Simulator

• Testing areas – Performance– Stress testing (load)– Error handling– Error recovery procedures

Conversion

• Types– Parallel– Cut over– Pilot– Piece by piece

• Help desk• Vendor technicians or consultants• Implementation problems cleanup

Audit

• After six months

• Check performance or success criteria

• Formal report to management for proper actions

LAN Design

• Number of nodes

• Usage

• Traffic: day and time

• Disk storage

• Speed

• Security and backup

• Compatibility

• Management

Voice Network Design

• Peak load and average load

• Grade of service

• Capacity & usage of circuits

• Overdesigning or planned delay

Points to Remember

• Analysis and Design

• Implementation

• LAN

• Voice Network Design

Discussion

• Develop a simple request for proposal to add e-business to a traditional department store.