What are the 4 types of non-functional requirements?

Types of Non-functional Requirement

• Usability requirement.
• Serviceability requirement.
• Manageability requirement.
• Recoverability requirement.
• Security requirement.
• Data Integrity requirement.
• Capacity requirement.
• Availability requirement.

What are non-functional user requirements?

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. They ensure the usability and effectiveness of the entire system.

What is non-functional requirements examples?

Non-Functional Requirements Examples Each page must load within 2 seconds. The process must finish within 3 hours so data is available by 8 a.m. local time after an overnight update. The system must meet Web Content Accessibility Guidelines WCAG 2.1. Database security must meet HIPPA requirements.

What is supportability in non-functional requirements?

Supportability: The system needs to be cost-effective to maintain. Maintainability requirements may cover diverse levels of documentation, such as system documentation, as well as test documentation, e.g. which test cases and test plans will accompany the system.

Which is not non-functional requirements?

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.

What is scalability in non-functional requirements?

Scalability is a non-functional property of a system that describes the ability to appropriately handle increasing (and decreasing) workloads. Scalability competes with and complements other non-functional requirements such as availability, reliability and performance.

What is recoverability in non-functional requirements?

Recoverability – Logical Requirement: The ability of the system to resume business functionality upon logical failure of application managed business data. A systems RPO is derived from this and other requirements.

How do you find non-functional requirements?

Non-functional Requirement Metrics

1. Time. Transactions / sec. Response time.
2. Space. Main memory. Auxiliary memory.
3. Usability. Training time. Number of choices.
4. Reliability. Mean time to failure. Downtime probability.
5. Robustness. Time to recovery. % of incidents leading to catastrophic failures.
6. Portability. % of non-portable code.

What is availability in non-functional requirements?

There is no one standard definition of an Availability Non-Functional Requirement. For the purposes of this article an Availability Requirement is any requirement that is not a functional, data or process requirement concerned with defining the periods when the solution can be used.

What is robustness in non-functional requirements?

The degree to which the information system proceeds as usual even after an interruption. Get Mastering Non-Functional Requirements now with O’Reilly online learning.

What is testability in non-functional requirements?

Non-functional testing is the testing of a circuit or system for its non-functional requirements. In essence, it tests the way a system or circuit operates, rather than specific behaviors of that system or circuit.