1. Background and Introduction<br />
<br />
Scientific data is usually obtained through measurements. The competency of a laboratory is evaluated by the accuracy of its testing data. For the same test item, distinct test principles or test methods may be used by the test operators. However there is no one uniform standard by which the accuracy of the test results can be evaluated. Some laboratories which own the testing instruments to test OTR and WVTR of the films also face this problem. It ...This story is related to the following:Testing Services |