A flaw in a component or system that can cause the component or system to fail to perform its required function - e.g. an incorrect statement or data definition. A defect - if encountered during execution - may cause a failure of the component or sys

Testing to determine the extent to which the software product is understood - easy to learn - easy to operate and attractive to the users under specified conditions. [After ISO 9126]

Hardware and software products installed at users' or customers' sites where the component or system under test will be used. The software may include operating systems - database management systems - and other applications.

A software tool used to carry out instrumentation.

Operational testing by potential and/or existing users/customers at an external site not otherwise involved with the developers - to determine whether or not a component or system satisfies the user/customer needs and fits within the business process

A variable (whether stored within a component or outside) that is read by a component.

A flaw in a component or system that can cause the component or system to fail to perform its required function - e.g. an incorrect statement or data definition. A defect - if encountered during execution - may cause a failure of the component or sys

A step-by-step presentation by the author of a document in order to gather information and to establish a common understanding of its content. [Freedman and Weinberg - IEEE 1028] See also peer review. A review of a software work product by colleagues

A meeting at the end of a project during which the project team members evaluate the project and learn lessons that can be applied to the next project.

A tool that supports the recording of requirements - requirements attributes (e.g. priority - knowledge responsible) and annotation - and facilitates traceability through layers of requirements and requirements change management. Some requirements ma