Non-Functional Requirements

NR ID	Requirement	Description

NR ID	Requirement	Description
NR-1	Stability	NR-1 Updating version
NR-2	Usability	NR-2 Keeping style format
NR-3	Extensibility	NR-3 Using up-to-date frameworks
NR-4	Platform
NR-5	Reliability
NR-6	Usability
NR-7	Usability
NR-8	Localization
NR-9	Reliability
NR-10	Extensibility
NR-11	Compatibility
NR-12	Reliability
NR-13	Portability

Some common assumptions and requirements are described in this topic:

Identifier
Requirement
Description
Measurement	Measure	NFRs must be Measurable. Delivery of NFRs can only be assured if they are measurable. Measurement includes defining: What is to be measured, e.g. Connectivity uptime.
	Method	How it is to be measured, e.g. ICMP Ping of URL performed by Nagios.
	Success	Success criteria, e.g. Sub-200ms response for 99.95% of the maximum available minutes per month under normal load conditions.
Dependencies	NFRs must recognise their dependencies. For example, the performance of a website video component that relies on 3rd Party content would be constrained by the performance of the 3rd Party system and the connectivity between the website and that system.