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19 Examples of Non-Functional Requirements

 , updated on September 14, 2022
A non-functional requirement is an qualitative requirement for a product, service, system, process, document, location, infrastructure component or facility. Where functional requirements specify what something does, a non-functional requirement specifies its qualities. In some cases, non-functional requirements are intangible things that require human judgement such as sensory analysis to implement and test. The following are examples of non-functional requirements.


Customer requirements for a fireplace ask that it be modern, comfortable and distinctive.


A hospital's patient record system is required to have 99.99% availability.


A breakfast cereal specifies that raisins have an attractive appearance such that they aren't crushed or discolored.


A beverage company requires that a pineapple juice be produced from ripe fruit that have a sweet as opposed to sour or bitter taste.


An aircraft engine is required to have 100% reliability.


A mobile device is required to be as light as possible given its functionality and constraints such as unit cost.


A business unit requires that all pages on a website load in less than 2 seconds for 99% of customers considering their location, bandwidth and latency.


Initial requirements for a vehicle navigation system state that all menus be easy to tap.


A bicycle manufacturer requires that all designs be easily deconstructable such that hobbyists can do self repairs and reuse parts.

Human Factors

Job requirements state that applicants need to be "good with people."


High level marketing requirements specify that a new coffee product be highly visible on the shelves next to the product's primary competition.

Human Error

Requirements for a furniture product state that customer assembly instructions need to be mistake proof.


Requirements for anything software related typically state that it be secure according to industry best practices.

Design To The Edges

A design for a remote control unit for an air conditioner begins with the requirement that 99.99% of all customers find it easy to use regardless of their age, background or native language.


Architectural requirements for self-driving vehicle state that the software be designed according to a set of microservice principles.


A solar panel company requires that at end of life all components be reusable and recyclable with minimal processing and energy expenditure.


Requirements for an industrial robot state that monthly scheduled maintenance be less than 3 hours for the robot's first five years of service life.
Overview: Non-Functional Requirements

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