Technical terms of quality management: W


Warning limit

Limiting values in a quality control chart that lie between the desired value (mean value) and the values for the action limits. If the characteristic value falls above or below this value, this usually leads to intensified monitoring of the process. (On the basis of DIN 55350-33)



  1. Substance, item or all movable physical objects which the owner disposes of, wants to dispose of, or must dispose of so that use for the original purpose is no longer possible. Waste legislation distinguishes between hazardous waste, non-hazardous waste, waste for recycling, and waste for disposal. Examples: Rejects, production residues, scrap metal, used oils. (On the basis of DIN 55350-11)
  2. See Muda.

Waste types

See Muda.



World Health Organization. www.who.int


Work breakdown structure

The work breakdown structure is the hierarchical breakdown of the project tasks into sub-tasks, down to level of the sub-tasks that are relevant for the person or the department. It comprises the description of the main tasks, sub-tasks and work packages. The work breakdown structure can be function-based (activities), object-based, or mixed (object and function).


Work environment

Environmental conditions at the workplace. This can include physical conditions such as temperature, social conditions such as working hours, psychological conditions such as working atmosphere, or environmental factors. (On the basis of ISO 9000:2015)


Work instruction

See Document.



Modeled work sequence that precisely describes the operational work steps.


Working measurement standard

Measuring instrument, measuring system or reference material whose dimensional accuracy can be traced back to a reference measurement standard, either directly or through an unbroken chain of calibrations. The working measurement standard is routinely used in order to calibrate or check material measures or measuring instruments (test and inspection equipment). (On the basis of DIN 1319-1).

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