Test design assistance device, test design assistance method, program and computer-readable medium

A test design assistance method causing a computer to execute a process comprising:

• acquiring information about the number of levels indicating the number of values which can be obtained for each factor in a plurality of factors of a test target;
• selecting a matrix capable of allocating all of factors in a maximum number of levels at least in the acquired information in the matrix capable of allocating the factors in multilevel generated based on an orthogonal table;
• setting the maximum number of levels in the number of levels of factors which are not allocated with respect to the selected matrix as a focused number of levels;
• allocating factors in the focused number of levels to the matrix when the number of columns capable of allocating the factors in the focused number of levels is equal to or greater than the number of factors in the focused number of levels, in the selected matrix;
• updating the matrix by dividing a remaining column into columns capable of allocating the factors in the focused number of levels when there is the remaining column which is capable of allocating factors in the number of levels greater than the focused number of levels in the matrix, in a case where the number of columns capable of allocating the factors in the focused number of levels is not equal to or greater than the number of factors in the focused number of levels, in the selected matrix;
• and
• executing the setting processing after the allocation processing or the updating processing and executing the setting processing, the allocation processing and the update processing recursively.

A non-transitory computer readable medium storing a program causing a computer to execute a process for test design assistance, the process comprising:

• acquiring information about the number of levels indicating the number of values which can be obtained for each factor in a plurality of factors of a test target;
• selecting a matrix capable of allocating all of factors in a maximum number of levels at least in the acquired information in the matrix capable of allocating the factors in multilevel generated based on an orthogonal table;
• setting the maximum number of levels in the number of levels of factors which are not allocated with respect to the selected matrix as a focused number of levels;
• allocating factors in the focused number of levels to the matrix when the number of columns capable of allocating the factors in the focused number of levels is equal to or greater than the number of factors in the focused number of levels, in the selected matrix;
• updating the matrix by dividing a remaining column into columns capable of allocating the factors in the focused number of levels when there is the remaining column which is capable of allocating factors in the number of levels greater than the focused number of levels in the matrix, in a case where the number of columns capable of allocating the factors in the focused number of levels is not equal to or greater than the number of factors in the focused number of levels, in the selected matrix;
• and
• executing the setting processing after the allocation processing or the updating processing and executing the setting processing, the allocation processing and the update processing recursively.