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English version of VDA dictionary

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Data integrity

Data protection from an inadmissible change or access.

Data, quality significant

Quality significant data are data (or information) originating within a quality management system or entering a quality management system.


Deadlock means that a programme is locked from further operation because two or more separate processes are queuing for action of another process.


Non-fulfillment of a requirement related to an intended or specified use.

Delphi method

Forecasting method based on existing expert knowledge being performed through multilevel questioning, assessment and summarising. At a sensible selection of experts, it ensures qualitatively valuable results.


Activity used to demonstrate by means of documents that an attained performance (of a product or service) meets specified requirements. Reference to a VDA publication (if the definition is specific to a particular publication, different from it, or complementary to an applicable standard): VDA volume 1.


Collective term used to describe the availability performance and its influencing factors: reliability performance, maintainability performance, and maintenance support performance.

Description of a defect from customer's perspective

Symptomatic deviation description. Typically, the customer describes obvious symptoms of a defect, e.g. “CD cannot be ejected”.

Description of a defect from supplier's perspective

Analytical qualified description, failure appearance, and mode of failure. The supplier describes the product defect, e.g. “a cogwheel of the CD ejecting mechanism is broken”.

Development environment

Set of tools that support development processes (key processes). Among other things, it covers planning tools, design tools, simulators and generators, and configuration tools.

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