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DATA Factual information used as a basis for reasoning, discussion, or calculation; often refers to quantitative information.

Data analysis (IEEE) (1) Evaluation of the description and intended use of each data item in the software design to ensure the structure and intended use will not result in a hazard. Data structures are assessed for data dependencies that circumvent isolation, partitioning, data aliasing, and fault containment issues affecting safety, and the control or mitigation of hazards. (2) Evaluation of the data structure and usage in the code to ensure each is defined and used properly by the program. Usually performed in conjunction with logic analysis.

Data Collection Gathering facts on how a process works and/or how a process is working from a customer's point of view. All data collection is driven by a knowledge of the process and guided by statistical principles.

Data corruption (ISO) A violation of data integrity. Syn: data contamination.