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Laboratories continually strive to ensure the quality of instruments, procedures, and capabilities. No matter how carefully they conduct these internal checks, systematic deviations often go unnoticed. It is therefore important that they regularly compare their measurement results with those of other laboratories (benchmarking). Participation in interlaboratory comparisons is a vital investment in reliability, operational certitude, and staff confidence. NMi Van Swinden Laboratory (NMi VSL), the Dutch national institute for metrology, has more than 30 years of experience in interlaboratory comparisons. NMi is accredited to organize interlaboratory comparisons. During my presentation I will highlight 12,5 years of yearly comparisons between NIST (USA) and NMi (The Netherlands) to support the Declaration of Equivalence between NIST and NMi in the gas analysis field. Furthermore I will present results of a major gas analysis interlaboratory scheme that NMi is organizing for the worldwide production locations of the oil company Shell. We started this exercise in 2003 and the very good news is, that the scheme recently became completely open. As such any laboratory is welcome to join the scheme. Based upon the success of our Shell PT scheme NMi started a marketing theme group to explore possibilities for a wider participation in interlaboratory comparisons. Although ISO/IEC 17025 requires participation, laboratories are not very willing to participate freely! Measurement precision is a hidden quality at all laboratories. It usually attracts attention if measurements fail to match those of other laboratories, indicating that there might be some kind of problem. Prior to that, no news is good news. So, how can we raise awareness!? Ideas to achieve this will be open for discussion. |
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