Evaluating the competence of test laboratories by Participating in Inter-comparison Tests and Statistical Analysis of Test Results

Participation in inter-laboratory comparison programs is an important means of laboratory quality control and assessing laboratory performance, and these programs can be used by customers or regulatory bodies for the selection of qualified laboratories. This research describes how to use inter-comparison tests and how to statistically analyse the test results. This research has a practical study of assessing laboratories performance in laboratories of the Syrian textile firms by distributing samples simultaneously to participating laboratories for testing. After collecting test results, the researcher used scientific methods to handle data to identify the weak points in laboratories performance and provide them the Feedback and technical advice to Assistance the lab to defining the measurement problems and evaluating of test methods and instrumentation , and could introduce some suggestions and recommendations to overcome.

Evaluation the technical competence of the thermal mechanical laboratories by using the statistical processing of test results

This research aims to present the importance of using statistical methods while establishing a quality management system in the laboratory according to the requirements of the international standard ISO 17025:2005. In addition the research describes how statistical analysis of the tests results works and includes a practical study to evaluate the technical competence of the laboratory by using the most common statistical methods (hypothesis testing) to study the results in a scientific way enables researchers to identify weaknesses in the laboratory performance, and thus provides it with feedback and technical advice helping to determine measurement problems and to check the Trueness of tests results. Finally, the research provides recommendations and proposals such as a necessity of applying practical methods for monitoring the performance of tests , making sure they meet quality requirements in terms of trueness and precision , and working to remove the causes that affect the quality of performance during all phases of testing, these proposals would – if they have been applied – support the laboratory to obtain the certification in accordance with international standard ISO 17025:2005.