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A software tool that is available to all potential users in source code form, usually via the internet. Its users are permitted, usually under license, to study, change, improve and, at times, to distribute the software.

A graphical representation of logical relationships between inputs (causes) and their associated outputs (effects).

A standard that describes the characteristics of a design or a design description of data or program components.

The set of conditions for officially starting a defined task.

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

The total costs incurred on Quality activities and issues and often split into prevention costs, appraisal costs, internal Failure costs and external failure costs.

The degree to which a component or system has a design and/or internal structure that is difficult to understand, maintain and verify.

The process of confirming that a component, system or person complies with specified requirements.

A source of a Defect such that if it is removed, the occurrence of the defect type is decreased or removed.

Any condition that deviates from expectation based on requirements specifications, design documents, user documents, standards, etc., or from someone’s perception or experience. Anomalies may be found during, but not limited to, reviewing, Testing, analysis, compilation, or use of software products or applicable documentation.