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A software tool or hardware device that runs concurrently with the component or system under test and supervises, records and/or analyzes the behavior of the component or system.

A group of software development methodologies based on iterative incremental development, where requirements and solutions evolve through collaboration between self-organizing cross-functional teams.

The process of encoding information so that only authorized parties can retrieve the original information, usually by means of a specific decryption key or process.

An entity or property used as a basis for test Coverage, e.g. equivalence partitions or code statements.

A device, computer program, or system that accepts the same inputs and produces the same outputs as a given system. [IEEE 610] See also simulator.

A program point at which the control flow has two or more alternative routes. A node with two or more links to separate branches.

The degree to which a component or system ensures that data are accessible only to those authorized to have access.

A security attack that is intended to overload the system with requests such that legitimate requests cannot be serviced.

The simultaneous execution of multiple independent threads by a component or system.

The criteria to define the coverage items required to reach a test objective