Author Topic: What are the Non Functional Requirements  (Read 20845 times)

12221242902

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #180 on: September 20, 2022, 08:17:00 pm »
Simply put, nonfunctional requirements are constraints imposed on the system. They're used to define the quality attributes which will determine how the system operates. Their main purpose is to make the product (application, software, website, or other) run more efficiently and thus improve the user experience. Nonfunctional Requirements (NFRs) define system attributes such as security, reliability, performance, maintainability, scalability, and usability. They serve as constraints or restrictions on the design of the system across the different backlogs.
Non-functional requirements or NFRs are a set of specifications that describe the system's operational capabilities and constraints and attempt to improve its functionality.
Performance and scalability.
Portability and compatibility. ...
Reliability, maintainability, availability.

12202326007

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #181 on: September 20, 2022, 08:22:21 pm »
Non-functional Requirements  define system attributes such as security, reliability, performance, maintainability, scalability, and usability. They serve as constraints or restrictions on the design of the system across the different backlogs.

12202326107

  • Global Moderator
  • Newbie
  • *****
  • Posts: 21
Re: What are the Non Functional Requirements
« Reply #182 on: September 30, 2022, 09:44:59 am »
Non-functional requirements describe how the system works, while functional requirements describe what the system should do.
This does not mean the latter are more important, but most requirement gathering techniques focus on functional requirements, so large gaps in non-functional requirements are common.
So what exactly are we looking for here? Well, here are four examples of Non-Functional requirement groups: usability, reliability, performance, and supportability.

12214268305

  • Global Moderator
  • Newbie
  • *****
  • Posts: 21
Re: What are the Non Functional Requirements
« Reply #183 on: October 01, 2022, 05:54:34 pm »
A non-functional requirement is defined as a requirement in which there are no technical aspects involved. It defines the quality attribute of a software system. It is applied to the system as a whole. A non functional requirement is usually defined by technical people example- software developers, architects and technical leaders. Examples of non functional requirements are- Users must change the initially assigned login password immediately after the first successful login and default password must expire to enable users with new passwords login feature.
Session should be timed out in case of page inactivity greater than 5 minutes

It focuses on user expectation. How the system should behave after performing a functionality
Non functional requirements help in ensuring good end user experience and ease of operating a software and helps in formulating security policy of a software system





12207348207

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #184 on: October 02, 2022, 05:06:41 pm »
Non-Functional Requirements are the constraints, or the requirements imposed on the system. They specify the quality attribute of the software. Non-Functional Requirements deal with issues like scalability, maintainability, performance, portability, security, reliability, and many more. Non-Functional Requirements address vital issues of quality for software systems. If NFRs not addressed properly, the results can include:
Users, clients, and developers are unsatisfied.
Inconsistent software.
Time and cost overrun to fix the software which was prepared without keeping NFRs in mind.

Types of Non-functional Requirement:

Scalability
Reliability
Regulatory
Maintainability
Serviceability
Utility
Security
Manageability
Data integrity
Capacity
Availability
Usability
Interoperability
Environmental

12121131908

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #185 on: October 04, 2022, 05:07:07 pm »
Non functional requirements define system attributes such as security, reliability, performance, maintainability, scalability and usability. NFR?s ensure effectiveness and usability of the entire system. Failing to meet any one of these requirements can lead to failed system to satisfy internal business, user or market needs.
BA?s are responsible to elicit requirements for NFR?s from it?s stakeholders by asking correct questions. Because, users are comfortable in stating the FR?s as they are working on it but NFR?s they don?t know anything.

12207348107

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #186 on: October 06, 2022, 03:57:41 pm »
Nonfunctional Requirements define system attributes such as security, reliability, performance, maintainability, scalability, and usability. They serve as constraints or restrictions on the design of the system across the different backlogs

12205210502

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #187 on: October 06, 2022, 05:30:53 pm »
Non Fictional Requirement refer to needs that must be fulfilled related to things like user interface, access security, availability, system failure, integration and migration. They do not deal with actual functionality of the system but represent key project success factors.

12221281305

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #188 on: October 06, 2022, 09:59:32 pm »
What are non functional requirements

Non functional requirements are those requirements which are not directly related to functionality or behaviour of the system, but these requirements describe environment conditions under which the system must remain to perform the actions expected by it to perform. These requirements describe the things like system user interface, capacity etc.

12205237902

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #189 on: October 07, 2022, 02:01:51 pm »
Here, are some examples of Non functional requirements:

Users must change the initially assigned login password immediately after the first successful login. Moreover, the initial should never be reused.
Employees never allowed to update their salary information. Such attempt should be reported to the security administrator.
Every unsuccessful attempt by a user to access an item of data shall be recorded on an audit trail.
A website should be capable enough to handle 20 million users with affecting its performance
The software should be portable. So moving from one OS to other OS does not create any problem.
Privacy of information, the export of restricted technologies, intellectual property rights, etc. should be audited.

12209253504

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #190 on: October 09, 2022, 12:33:10 pm »
NFR- Non functional requirement is a requirement that satisfy those criteria which is apart form the functional requirements which means NFR's criteria that can be used to judge the operation of a system, rather than specific behaviors. They define the attributes of the system security, reliability, performance, maintainability, scalability, and usability. They serve as constraints or restrictions on the design of the system across the different backlogs.

Let's understand this example:
Suppose there is a login page so here the functional requirements will be the two text fields such as username and password where as the non functional requirement in this login page will be that the page should load within 2 seconds after clicking on the link.

12212213802

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #191 on: October 10, 2022, 12:10:40 pm »
Non Functional requirements are a set of specification that describes the system operation ca[abilities and constraints and attempt to improve its functionality .

12214260404

  • Global Moderator
  • Newbie
  • *****
  • Posts: 21
Re: What are the Non Functional Requirements
« Reply #192 on: October 10, 2022, 01:29:47 pm »
Non-Functional Requirements are the constraints or the requirements imposed on the system. They specify the quality attribute of the software. Non-Functional Requirements deal with issues like scalability, maintainability, performance, portability, security, reliability, and many more. Non-Functional Requirements address vital issues of quality for software systems. If NFRs not addressed properly, the results can include:

Users, clients, and developers are unsatisfied.
Inconsistent software.
Time and cost overrun to fix the software which was prepared without keeping NFRs in mind.

12202321906

  • Global Moderator
  • Newbie
  • *****
  • Posts: 29
Re: What are the Non Functional Requirements
« Reply #193 on: October 10, 2022, 08:09:23 pm »
Non functional requirements are not related to the system functionality they rather define how the system should perform. They do not directly relate to the behavior or functionality of the solution instead they describes the environment conditions under which the system performs.

12126155807

  • Global Moderator
  • Newbie
  • *****
  • Posts: 20
Re: What are the Non Functional Requirements
« Reply #194 on: October 10, 2022, 08:20:07 pm »
Non-Functional Requirements are the constraints or the requirements imposed on the system. They specify the quality attribute of the software. Non-Functional Requirements deal with issues like scalability, maintainability, performance, portability, security, reliability, and many more. Non-Functional Requirements address vital issues of quality for software systems. If NFRs not addressed properly, the results can include:
Users, clients, and developers are unsatisfied.
Inconsistent software.
Time and cost overrun to fix the software which was prepared without keeping NFRs in mind.
Types of Non-functional Requirement :

1.Scalability
2.Reliability
3.Regulatory
4.Maintainability
5.Serviceability
6.Utility
7.Security
8.Manageability
9.Data integrity
10.Capacity
11.Availability
12.Usability
13.Interoperability
14.Environmental