SAFe: Non-functional requirements

If there’s any one thing that all projects should have to ensure a successful project outcome, that is a comprehensive and sensible collection of non-functional requirements, aside from functional requirements.
NFR or non-functional requirements is responsible for describing how the system runs. Essentially, it identifies how the system should work and that is a constriction on the behavior of the system. Also, you can think of NFR as a quality attribute of a system. It covers all the remaining necessities which are not comprised by the functional requirements. Instead of specifying specific behaviors, they identify criteria that judge the system’s operation.
What are the typical non-functional requirements?
There are many typical NFR included, some of them include:
• Performance
Requirements on resources required, throughput, static volumetric, utilization, benchmark utilizations, response time or whatever thing that is having to do with performance.
• Precision and accuracy
This refers to the precision and accuracy of the data. However, each one is advisable to become beware of the one hundred percent requirements, as they frequently cost great amount of money.
• Modifiability
This is the requirements about the effort needed to make software changes.
• Reliability
Requirements on how frequent the software fails. Often, the measurement is expressed in mean time between failures (MTBF). The description of the failure should be clear. People also get confuse between reliability and availability, which, in the first place should not because they are quite different types of requirements. Make sure to identify the results of software failure, a strategy to detect error, a correction strategy and how to protect from failure.
• Portability
This is the required effort to move the software into various target platforms. Mostly, the measurement is person-months or percent of elements that need altering.
• Usability
The requirements on how challenging it will be to learn and run the system. Often, the requirements are conveyed in learning time or other similar metrics.
• Security
One or more requirements on system protection and its data. The measurements may be expressed in a range of ways such as time, skill level and effort, among others, to get in the system.
• Integrity
Integrity requirements describe the system’s security attributes, which restricts access to data or feature to particular users as well as protect the privacy of data entered in the software.
• Robustness
A robust system is the one responsible for handling error conditions in a graceful way, with no failure. This includes a forbearance of invalid data, unexpected operating conditions and software detects.
There are other typical NFR included, and some of them are capacity, scalability, availability, maintainability, recoverability, serviceability, environmental, manageability, regulatory and interoperability.
With the increasing demand in this system, more and more companies are trying to get the interest and trust of clients, promising them a high quality service and product. But if you really want total assistance, Scaled Agile Framework is the best partner you can depend on with your non-functional requirements.
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