OTHER REQUIREMENTS, REQUIREMENT SPECIFICATION

AND MAP

CSK – oxford Engineering College -trichy

OTHER REQUIREMENTS

OTHER REQUIREMENTS It applies across all the components of

the system which includes. Supplemental requirementsFinancial requirementsEnterprise requirements

SUPPLEMENTAL REQUIREMENTS Three characteristics of performance

that reflect customer’s impact are Operational suitabilitySupportability and Confidence.

Operational suitability:Measure of how well our network design can

be configured, monitored and adjusted by the customer’s operators.

SUPPLEMENTAL REQUIREMENTS Supportability:

Measure of how well the customer can keep the system performing as designed, over the entire life of the system.

Confidence:Measure of the ability of the network to

deliver data without error or loss at the required throughput(rate of production).

During the requirements analysis phase: The network engineer ensures that the customer

understands the trade-offs(quality/aspect) between cost and performance.

SUPPLEMENTAL REQUIREMENTS Engineer prepares customers network

has exceeded the design capacity thusAn upgrade (or)Service life extension (or) Replacement.

Network design to support 1000 connections should be aware that, when their becomes 20,000 connections, they need an entirely different network.

SUPPLEMENTAL REQUIREMENTS These three factors must be taken into

account when contracting for external services, Such as

WAN, MAN (or) ISP connections (or) Maintenance services.

FINANCIAL REQUIREMENTS Funding to network devices and

services, instead of including of the parts of the system(ex: desktop computer and servers).

Funding is bounded by an overall cost limit, consisting of both (One time cost. Recurring cost (repeatedly/ periodically).

FINANCIAL REQUIREMENTS One time cost :

Based on the actual planning and construction of the network.

Consist of network architecture, design, procurement(external source), deployment, integration, testing network hardware / software components, the initial installation or establishment of any services from service providers.

Recurring cost : Tasks and items that are expected / replaced /

upgraded on a periodic basis. This includes network OAM&P (Operations,

Administration, Maintenance & Provisions(supply)), modifications(edit) to the network.

FINANCIAL REQUIREMENTS Time frames for recurring costs vary ,

Driven by customer/ user/ administrative, management financial cycles(accrual accounting, audit, budget cycle, budget execution), technology cycles(development phase).

Financial requirements gathered during the analysis process.

ENTERPRISE REQUIREMENTS Enterprise requirements are

Phone, FAX, voice based and video based.The integration of these types of

requirements over the same transmission infrastructure as data is becoming common.

REQUIREMENT SPECIFICATION & MAP It shows the location dependencies

between application and devices. MAP: Requirement analysis, gathering,

deriving and determining requirements from variety of sources including users, management, application and staff.

Requirements specification: (figure refer book)

ID/Name , date, type Description, gathered / delivered, Locations, status, priority.

REQUIREMENT SPECIFICATION & MAP ID/ Name : name of the requirement Date : indicates the date that the

requirement was developed. Type: component from which

requirements (user, application, device, network or other)

Description: details for the requirements. It indicate functional / non – functional.

Gathered / Derived: a requirement was gathered, this where it is gathered. Requirements was derived, this how it was derived.

REQUIREMENT SPECIFICATION & MAP Locations: where this requirement applies

in the environment. Status : represents the current state of

this requirement(core or fundamental, features, future requirements, rejected requirements).

Priority: representing priority level of this requirement.s/w requirements may be managed and

tracked through common word – processing and spread sheet software applications.

REQUIREMENT ANALYSIS FOR A COMPANY

Gathering requirements for building a LAN network, the result as follows150 users:

(60 – Engineers) (15 – HR Executives) & finance (30 - Manufacturer) (10 - management) (30 – sales / marketing) (05 - others)

REQUIREMENT ANALYSIS FOR A COMPANY Each area in the building must support fast

Ethernet connection to the backbone. Inventory application for manufacturing

requirements not determined at this time. Database application require a minimum of

150 kb/s per session. Visualization application finance requires up

to 40 mb/s cap and 100 ms round trip delay. Payroll applications(financial records of

salaries for an employee, wages, bonuses and deductions) require 100% uptime between finance and outside payroll company.

REQUIREMENT ANALYSIS FOR A COMPANY

Company must be kept secure from internet attacks.

Other general applications: Mail. Word processing Internal / external web access.

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