Author Topic: What are the Non Functional Requirements  (Read 19300 times)

12205210102

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Re: What are the Non Functional Requirements
« Reply #135 on: June 29, 2022, 06:06:33 pm »
Non-Functional Requirements are the constraints, or the requirements imposed on a system. They specify the quality attribute of a product. NFR's deal with issues like scalability, maintainability, performance, portability, security, reliability etc. NFR?s addresses vital issues of quality. If NFRs are not addressed properly, then
Users, clients, are not satisfied with the product
Time and cost overrun to fix the issues which was prepared without keeping NFRs in mind.
in general there are different types of Non-functional Requirements like Scalability, Reliability, Regulatory,   Maintainability, Serviceability, Utility, Security, Manageability, Data integrity, Capacity, Regulatory, Availability, Usability, Interoperability, Environmental etc..

12223255405

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Re: What are the Non Functional Requirements
« Reply #136 on: July 02, 2022, 06:45:54 pm »
Non functional Requirements: It defines the behaviour of the system under certain conditions. They define the quality attributes of the system.
                                            It defines how should the software system fulfill the functional requirements.

                                            Ex: Performance, Reliability, Security, Data integrity, Usability, Scalability, Portability.

12217236302

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Re: What are the Non Functional Requirements
« Reply #137 on: July 13, 2022, 03:04:46 pm »
non-functional Requirements - can be defined as the requirement which specify how the system reacts in the given conditions. this are mostly related to the quality of the system.

types of non functional requirement

Usability
Security
Maintainability
Scalability
Reliability
Efficiency
Compatibility

12215201301

  • Guest
Re: What are the Non Functional Requirements
« Reply #138 on: July 15, 2022, 03:53:52 pm »
Speed. Speed determines how fast an application responds to commands. ...
Security
Portability
Compatibility
Capacity
Reliability
Environment
Localization

12209232002

  • Guest
Re: What are the Non Functional Requirements
« Reply #139 on: August 02, 2022, 04:26:08 pm »
While a system can still work if NFRs are not met, it may not meet user or stakeholder expectations, or the needs of the business.

NFRs also keep functional requirements in line, so to speak. Attributes that make the product affordable, easy to use, and accessible, for example, come from NFRs.

Let?s get more specific.



Essential Tips for Modern Requirements Management | Perforce

Types of Non Functional Requirements
There are many common categories of non functional requirements.

NFRs are often thought of as the ?itys.? While the specifics will vary between products, having a list of these NFR types defined up front provides a handy checklist to make sure you?re not missing critical requirements.

This is not an exhaustive list, but here?s what we mean: 

NFR ?Itys?
Security ? Does your product store or transmit sensitive information? Does your IT department require adherence to specific standards? What security best practices are used in your industry?

Capacity ? What are your system?s storage requirements, today and in the future? How will your system scale up for increasing volume demands?

Compatibility ? What are the minimum hardware requirements? What operating systems and their versions must be supported?

Reliability and Availability ? What is the critical failure time under normal usage? Does a user need access to this all hours of every day?

Maintainability  + Manageability?How much time does it take to fix components, and how easily can an administrator manage the system? Under this umbrella, you could also define Recoverability and Serviceability.

Scalability ? The Black Friday test. What are the highest workloads under which the system will still perform as expected?

Usability ? How easy is it to use the product? What defines the experience of using the product?

?Ity?s? don?t cover all types, however.

 

Other Common Types of Non-Functional Requirements
Performance ? How quickly does the system respond to users? actions, or how long does a user wait for a specific operation to happen?

Regulatory ? Are there requirements you need to satisfy for compliance?

Environmental ? What types of environments will the system be expected to perform within?

📖 READ THE WHITE PAPER: 9 TIPS FOR WRITING USEFUL REQUIREMENTS >>
 

Non Functional Requirements Examples
Now that you understand the types of NFRs, let?s look at some actual examples.


Best Practices for Writing Non-Functional Requirements
Our blog on functional requirements outlines some tips on how to write requirements well, and they apply to both functional and non functional requirements. Some include:

Be consistent in terminology and format.
Quantify requirements ? if a stakeholder wants a website to load ?quickly,? ask what that means (3 seconds or less? 2 seconds or less?)
If you intend to reuse the requirement, write it as such ? use ?accept payment? rather than ?accept payment through Apple Pay,? for example.

12212216902

  • Guest
Re: What are the Non Functional Requirements
« Reply #140 on: August 03, 2022, 03:07:25 pm »

Non-functional requirements are quality attributes that describe how the system should be. They judge the system as a whole based on fitness standards like Performance, Usability, Scalability, Security, Maintainability, Responsiveness, and more. Equally as vital as functional requirements, failure to identify, design for, and meet the non-functional requirements that satisfy end-user needs can result in projects that fail or fall short.

12208195301

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Re: What are the Non Functional Requirements
« Reply #141 on: August 04, 2022, 10:28:53 am »
Non-functional requirements are the set of specifications that describe the system's operation capabilities and constraints which helps to improve its functionality.

12230256704

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Re: What are the Non Functional Requirements
« Reply #142 on: August 06, 2022, 07:18:22 am »
Non Functional Requirement
Non-functional requirements don?t directly relate to the behavior or
the functionality of the solution, but rather describes environmental conditions
under which the solution must remain effective like capacity, speed, security, etc.

12202253104

  • Guest
Re: What are the Non Functional Requirements
« Reply #143 on: August 06, 2022, 01:52:29 pm »
Non Functional requirements would be requirements that affect the project but not directly. A simple example would be :

A store has a payment mode but it needs a card machine to complete the payment so this can be included in non-functional requirements.

12228258603

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Re: What are the Non Functional Requirements
« Reply #144 on: August 10, 2022, 11:30:24 am »
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.

12221277305

  • Guest
Re: What are the Non Functional Requirements
« Reply #145 on: August 11, 2022, 02:00:07 pm »
The definition of a non-functional requirement is: ?Any requirement that specifies how the system performs a certain function.? In other words, a non-functional requirement will describe how a system should behave and what limits there are on its functionality.

12223223904

  • Guest
Re: What are the Non Functional Requirements
« Reply #146 on: August 13, 2022, 02:56:59 pm »
Non-functional requirement means,
Any requirement that specifies how the system performs a certain function.
In simple words, a non-functional requirement will describe how a system should behave and what limits there are on its functionality.
Non-Functional requirements would be requirements that affect the project but not directly.
Non-Functional requirement also known as quality or supplementary requirements. These can include requirements related to capacity, speed, security, and presentation of the user interface.

12221297205

  • Guest
Re: What are the Non Functional Requirements
« Reply #147 on: August 16, 2022, 02:05:09 pm »
Non functional requirement are those which are not MUST requirement but this is should requirement i.e less prioritised as compare to functional requirement. Suppose we want to enter an amazon and want to buy something Then REGISTRATION is fuctional requirement
and time required to enter website latency period say 3 sec is non functional requirement.

It can be as follows:
1)Security
2)Capacity
4)Reliability
5)speed
6)scalability
7)Usability
8)regulatory
9)environmental

12202217304

  • Guest
Re: What are the Non Functional Requirements
« Reply #148 on: August 16, 2022, 05:00:25 pm »
Non-functional requirements are the requirements which are not related to the operations to be carried out in order to build a project, but rather they are supplementary or environmental conditions under which the project will be made effective. Parameters like security, reliability, speed, capacity. Like if a website can only be used with chrome browser then this a non-functional requirement as it is related to browser compatibility.

12221283105

  • Guest
Re: What are the Non Functional Requirements
« Reply #149 on: August 19, 2022, 03:21:11 pm »
Non-functional requirements are the requirements that are related to the behavior of the system. Non-functional Requirements describe the qualities of the process or system.
It includes scalability, security, performance, flexibility, reusability, reliability, and maintenance.

The documents that are prepared for non-functional requirements are known as Supplementary Support Documents (SSD).

Example: Web page should load in 3 seconds.