Author Topic: What are the Non Functional Requirements  (Read 2088 times)

1183170103

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Re: What are the Non Functional Requirements
« Reply #30 on: June 15, 2018, 03:03:45 pm »
As opposed to functional requirements which are things that the system must do, Non-functional requirements are conditions under which the system must meet those functional requirements. In other words, they are qualities that a system must have.

E.g. - security requirements, scalability requirements, capacity requirements, availability requirements etc

1180364903

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Re: What are the Non Functional Requirements
« Reply #31 on: June 21, 2018, 08:41:42 pm »
A non-functional requirement (NFR) is a requirement that specifies criteria that can be used to judge the operation of a system, rather than specific behaviors.
Non-functional requirements are often called 'quality attributes' of a system. Other terms for non-functional requirements are "qualities", "quality goals", "quality of service requirements", "constraints" and "non-behavioral requirements".

1181472704

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Re: What are the Non Functional Requirements
« Reply #32 on: June 25, 2018, 08:14:19 am »
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.
Also known as system qualities, nonfunctional requirements are just as critical as functional Epics, Capabilities, Features, and Stories. They ensure the usability and effectiveness of the entire system. Failing to meet any one of them can result in systems that fail to satisfy internal business, user, or market needs, or that do not fulfill mandatory requirements imposed by regulatory or standards agencies.

1181471104

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Re: What are the Non Functional Requirements
« Reply #33 on: June 27, 2018, 11:29:02 am »
Non-functional requirements cover all the remaining requirements which are not covered by the functional requirements. They specify criteria that judge the operation of a system, rather than specific behaviours, for example: “Modified data in a database should be updated for all users accessing it within 2 seconds.”
            these can include requirements related to capacity, speed, security,availability and the information architecture and presentation of the user interface.

1181278305

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Re: What are the Non Functional Requirements
« Reply #34 on: July 11, 2018, 10:41:49 pm »
Non-functional requirement. In systems engineering and requirements engineering, a non-functional requirement  is a requirement that specifies criteria that can be used to judge the operation of a system, rather than specific behaviors. ... Non-functional requirements are often called "quality attributes" of a system.

Some typical non-functional requirements are:
Performance – for example Response Time, Throughput, Utilization, Static Volumetric.
Scalability.
Capacity.
Availability.
Reliability.
Recoverability.
Maintainability.
Serviceability.

1170505308

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Re: What are the Non Functional Requirements
« Reply #35 on: July 15, 2018, 11:17:40 pm »
Non-functional Requirements : defines conditions that do not directly connected to the behavior or functionality of the solution, but rather describe environmental conditions under which the solution must remain effective or qualities that the systems must have.
Non-functional requirement example – “The system response time shall be maximum 2 seconds.”

In other words, Non Functional requirements would describe the how the system works and Functional Requirements does specify what system is supposed to do.

Most of the requirement gathering techniques focuses/allows to focus on the Functional requirement.

The statements under this requirements talks about security, Performance, Reliability, usability.
If any one of the above requirements are failed to met, then the system fails to satisfy the business needs of the internal customers. So, Non functional requirements are equally important as Functional requirements as they ensure the usability and effectiveness of the entire system.