contact person: your proficiency testing team

Your benefit:

Our proficiency testing schemes cover, amongst others, a wide range of tests and analysis for plastics, packaging and consumer goods. Thus you can benefit from our high quality standards in all important testing fields:

  • Plastic films
  • Thermoplastics
  • Geosynthetics
  • Fibre-reinforced plastic composites
  • Plastic paint/aluminium wheels
  • Textiles
  • Rubber and TPE
  • Foams

By participating in our proficiency testing schemes you have an objective and independent impression of your quality and performance of your routine testing method. Your benefits taking part in DRRR proficiency testing schemes:

  • Participation in proficiency testing is required by several facilities
  • Participants can compare, assure and improve their own performance and quality
  • Recognition of the applied method compared to the other laboratories
  • Unquestionable lab performance towards customers and certification authorities
  • Saving costs of lab development and maintenance
  • Saving on the working time in the lab and many other benefits


For selective Proficiency Tests parts of the work were subcontracted.

Statistical principles:

Depending on the distribution of the data, the following statistical methods are used for evaluation, amongst others:

  • sensible statistics
  • sensible statistics with outlier elimination (e.g. Grubbs or expert outliers)
  • robust statistics (Hampel-Schätzer, Q-method)

Schedule for the Proficiency Tests plastics / textiles 2017:

The sample shipment for the proficiency test for plastics and textiles is planned for last week in April (24-28.04.2017). This shipment date counts for all mentioned proficiency tests, except for proficiency tests where another shipping date is mentioned in our registration form.