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In this module, we’ll discover effective techniques for managing the requirements engineering process all the way through the development cycle. It is concerned with the definition of software requirements and the products generated in that definition. The process involves requirements identification, requirements analysis, requirements specification, requirements communication and development of acceptance criteria and procedures.

Introduction

In systems engineering and software engineering, requirements analysis encompasses those tasks that go into determining the requirements of a new or altered system, taking account of the possibly conflicting requirements of the various stakeholders, such as users. Requirements analysis is critical to the success of a project.

Systematic requirements analysis is also known as requirements engineering. It is sometimes referred to loosely by names such as requirements gathering, requirements capture, or requirements specification. The term "requirements analysis" can also be applied specifically to the analysis proper (as opposed to elicitation or documentation of the requirements, for instance).

Requirements must be measurable, testable, related to identified business needs or opportunities, and defined to a level of detail sufficient for system design.

Requirements process

Software requirements fundamentals

Definition of a software requirement

At its most basic, a software requirement is a property which must be exhibited in order to solve some problem in the real world. This session refers to requirements on “software” because it is concerned with problems to be addressed by software. Hence, a software requirement is a property which must be exhibited by software developed or adapted to solve a particular problem. The problem may be to automate part of a task of someone who will use the software, to support the business processes of the organization that has commissioned the software, to correct shortcomings of existing software, to control a device, and many more. The functioning of users, business processes, and devices is typically complex. By extension, therefore, the requirements on particular software are typically a complex combination of requirements from different people at different levels of an organization and from the environment in which the software will operate.

An essential property of all software requirements is that they be verifiable. It may be difficult or costly to verify certain software requirements. For example, verification of the throughput requirement on the call center may necessitate the development of simulation software. Both the software requirements and software quality personnel must ensure that the requirements can be verified within the available resource constraints.

Requirements have other attributes in addition to the behavioral properties that they express. Common examples include a priority rating to enable trade-offs in the face of finite resources and a status value to enable project progress to be monitored. Typically, software requirements are uniquely identified so that they can be over the entire software life cycle.

Questions & Answers

define iterative model. example of iterative model. advantages and disadvantages of iterative model. when to use iterative model
Okello Reply
i try out in netbeans this code:public class Profile { private Profile(int w) { // line 1 System.out.println(w); } public final Profile() { // line 5 System.out.println(10); } public static void main(String args[]) { Profile obj = new Profile(50); } } It is the question 5, and the answer is 50
Jacqueline Reply
i need help....Discuss the factors that influence the choice of the software development methodology to use when implementing software projects?(20)
tatenda Reply
The success rate of software development projects can be increased by using a methodology that is adequate for the specific characteristics of those projects.  then the focus on RAD,XP,RUP.
Hemant
hemant hie...it is a presentation i am working on...can you help me wth the introduction....please a powerful one hahahahha
tatenda
yes
Hemant
Define and show all Dipthongs and vowels used in english phonetics
Okendro Reply
what is the software engineering
Axmed Reply
Please how can I create an application?
Eric Reply
please how can I create an application
Nchor
How do we create a software
Florence Reply
give a more direct question
Louis Reply
what is semantics?
amjad
what r the computer codes
Kawuba Reply
machine code, source code , object code, and byte code etc
Hemant
what is software
Manobendra Reply
a collection of program executable by code is called software
Hemant
how can I create a software
Mary Reply
use in any model . then after you create any software
Hemant
what is capability maturity model integration
Muctarr
what is maturity level
Muctarr
maturity level is organization's process improvement achievement in multiple process areas
Hemant
how to trubulshoot is configuration ?
priya Reply
hello
Julius
hello
abeer
hello
Sahil
hello
Natnael
Hello
Eric
Guy's put your answer only
Natnael
click start then click run then type msconfig then ok
Natnael
explain coco model
dawood Reply
it model based on LOC. i.e; number of lines of code.
Hemant
What is a client engineer
buthayna Reply
A Customer Engineer (CE) is a worker whose primary job scope is to provide a service to customers who have signed a contract with the company.
Fokuo
Thank you
buthayna
Hi
ahly
hello,how are you doing?
Fokuo
nothing
Hemant
it's a pleasure meeting you.
Fokuo
tq
Hemant
Nice to meet you too
Hemant
good night
Hemant
hi in here
Asongafac
hello
Eric
please I want to more about this group
Asongafac
pravinkumar
pravin
hello
pravin
I want to create software
Michael
name suraj kumae
Suraj
how can i ave install usb drive but get it not connecting phone
Micheal Reply
hmm
abang
may be it has a problem
abang
maybe u should change usb drive
gabriel
yes
Ali

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Source:  OpenStax, Software engineering. OpenStax CNX. Jul 29, 2009 Download for free at http://cnx.org/content/col10790/1.1
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