The Association for Quality Management in Vehicle Monitoring e.V. (QM-Verein) was installed in 2008 by 24 of the 26 PTI organisations operating in Germany as a neutral institution and was commissioned with the development as well as the coordination of cross-competitive quality controls. The members represent about 90 % of the German PTI market.

The main task is the continuous measurement of the quality of the PTI by means of unannounced follow-up inspections (UN). These are carried out nationwide and according to uniform standards directly after the previous PTI. The four-eye principle guarantees objective assessments.
Quality indicators allow for organization-, region- and country-specific assessments of quality. They show developments and provide recommendations for action for the individual quality work of the members.

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