Tester and method for testing a device under test using relevance scores

A method for testing a device under test, the method comprising:

• performing a test of the device under test using multiple test cases, wherein each test case comprises variable values of predetermined input variables;
• deriving an output value for each test case indicating whether the device under test validly operates or provides an error at a current test case;
• evaluating the multiple test cases based on a plurality of subsets of the predetermined input variables in relation to a respective the output value, and wherein the subsets of predetermined input variables are smaller than the predetermined input variables;
• providing a plurality of plots associated with an evaluation of the multiple test cases, wherein each plot of the plurality of plots indicates an impact of one subset of the plurality of subsets of the predetermined input variables to the respective output value using a relevance score;
• and
• determining relevance scores for the plurality of subsets of predetermined input variables, wherein each respective relevance score indicates a respective relevance of each of the plurality of subsets when determining an impact of the plurality of subsets of predetermined input variables on errors of the device under test.

A non-transitory digital storage medium having stored thereon a computer program for performing a method of testing a device under test, the method comprising:

• performing a test of the device under test using multiple test cases, wherein each test case comprises variable values of predetermined input variables;
• deriving an output value for each test case indicating whether the device under test validly operates or provides an error at a current test case;
• evaluating the multiple test cases based on a plurality of subsets of the predetermined input variables in relation to a respective output value, and wherein the subsets of predetermined input variables are smaller than the predetermined input variables;
• providing a plurality of plots associated with an evaluation of the multiple test cases, wherein each plot of the plurality of plots indicates an impact of one subset of the plurality of subsets of the predetermined input variables to the respective output value using a relevance score;
• and
• determining relevance scores for the plurality of subsets of predetermined input variables, wherein each respective relevance score indicates a respective relevance of each of the plurality of subsets when determining an impact of the plurality of subsets of predetermined input variables on errors of the device under test.