Qualitative test
The purpose of the test is to obtain information that can judge the performance of the test object, to judge whether it is right or wrong, or to obtain information about the trend and trend . Such a test is called a qualitative test. For example, the bending method is used to detect the brittleness , and the displacement method is used to determine whether there is a molecular film on the surface. Qualitative tests are used to determine the nature of the test items, but there are no or few quantitative parameters to illustrate the extent to which these properties have been achieved. Qualitative test is sometimes a preliminary test before quantitative test. If the test result is positive for a certain index, when the degree of certainty is needed, the next quantitative test should be done.
If a test only needs qualitative results to make conclusions or judgments, there is no need continue to do quantitative tests, because usually quantitative tests control the test conditions more strictly, so the cost will be higher.
Quantitative test
Quantitative experiments refer to experiments done in order to obtain certain parameters in terms of quantities. The results obtained through experiments have definite values and values, which can be compared with existing parameters and values to draw corresponding conclusions. Quantitative test is a test . There must be more accurate requirements for the test equipment, tools, and raw material grades. It is necessary to have equipment parameters and values corresponding to the accuracy of the measured values. requirements , otherwise the measured data has no reference value. Quantitative tests require more detailed original records, and relevant documents or certificates to prove the reliability of these parameters, otherwise the obtained parameters still cannot be used as the basis for making judgments.
