Description: A structural and logical scheme of the uncertainty of the test results at various stages of implementation. It has been shown that when assessing the combined uncertainty of the test results must take into account the features of these stages. Since the tests are generally not known for a functional connection between the components of the tests required, depending on the type of problems solved in the tests, implement appropriate approaches in the evaluation of uncertainty of results. It is noted that the reduction of uncertainty of test results requires a comprehensive approach.
Keywords: testing, the uncertainty of results, test, test conditions, method, standard sample