FURPS is an acronym representing a model for classifying software quality attributes (functional

Functional requirements

In software engineering, a functional requirement defines a function of a software system or its component. A function is described as a set of inputs, the behavior, and outputs ....

 & non-functional

Non-functional requirements

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. This should be contrasted with functional requirements that define specific behavior or...

 requirements):

• Functionality
  Functional requirements
  In software engineering, a functional requirement defines a function of a software system or its component. A function is described as a set of inputs, the behavior, and outputs ....
  
   - Feature set, Capabilities, Generality, Security
• Usability
  Usability
  Usability is the ease of use and learnability of a human-made object. The object of use can be a software application, website, book, tool, machine, process, or anything a human interacts with. A usability study may be conducted as a primary job function by a usability analyst or as a secondary job...
  
   - Human factors, Aesthetics, Consistency, Documentation
• Reliability
  Reliability engineering
  Reliability engineering is an engineering field, that deals with the study, evaluation, and life-cycle management of reliability: the ability of a system or component to perform its required functions under stated conditions for a specified period of time. It is often measured as a probability of...
  
   - Frequency/severity of failure, Recoverability, Predictability, Accuracy, Mean time to failure
• Performance
  Computer performance
  Computer performance is characterized by the amount of useful work accomplished by a computer system compared to the time and resources used.Depending on the context, good computer performance may involve one or more of the following:...
  
   - Speed, Efficiency, Resource consumption, Throughput, Response time
• Supportability
  Supportability
  Supportability can refer to:*Supportability **Supportability...
  
   - Testability, Extensibility, Adaptability, Maintainability, Compatibility, Configurability, Serviceability, Installability, Localizability, Portability

The model, developed at Hewlett-Packard

Hewlett-Packard

Hewlett-Packard Company or HP is an American multinational information technology corporation headquartered in Palo Alto, California, USA that provides products, technologies, softwares, solutions and services to consumers, small- and medium-sized businesses and large enterprises, including...

, was first publicly elaborated by Grady and Caswell. FURPS+ is now widely used in the software industry. The + was later added to the model after various campaigns at HP to extend the acronym to emphasize various attributes.

External links

• IBM on Furps+