3. It applies across all the components of the
system which includes.
Supplemental requirements
Financial requirements
Enterprise requirements
4. Three characteristics of performance that
reflect customer’s impact are
Operational suitability
Supportability and
Confidence.
Operational suitability:
Measure of how well our network design can be
configured, monitored and adjusted by the
customer’s operators.
5. 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.
6. Engineer prepares customers network has
exceeded the design capacity thus
An 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.
7. These three factors must be taken into
account when contracting for external
services,
Such as
WAN, MAN (or)
ISP connections (or)
Maintenance services.
8. 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).
9. 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.
10. 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.
11. 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.
12. 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.
13. 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.
14. 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.
15. Gathering requirements for building a LAN
network, the result as follows
150 users:
(60 – Engineers)
(15 – HR Executives) & finance
(30 - Manufacturer)
(10 - management)
(30 – sales / marketing)
(05 - others)
16. 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.
17. Company must be kept secure from internet
attacks.
Other general applications:
Mail.
Word processing
Internal / external web access.