The stages of measuring the effort for the fair of a father to his children are as follows.

1.Determine the N value which greater than one according to the terms of use of the Harmony in Gradation formula, i.e. in this case is the number of children; 2.Assume the needs of the children, and write in a mathematical notation as Xi. For example, the children are three, and then write the needs of the first child as X1, the needs of the second child as X2, and the needs of the third child as X3. With notes, these needs may be material or non-material; 3.Divide according to the ability of the father, and write in the mathematical notation as Yi. For example, the children are three, then write the giving to the first child as Y1, giving to the second child as Y2, and giving to the third child as Y3. With notes, these allocations may be material or non-material; 4.Calculate the elemental strength or Si in Harmony in Gradation formula, which is the ratio between (Yi/Xi) and Total of (Yi/Xi, i=1, 2, ……N); and 5.Calculating the index of efforts for the fairness, which is the same as the results of the calculation of Harmony in Gradation. With a note that is measured here is an effort for the fairness and may assess as the perfection of effort, but not the level of fairness itself.

Note: If the calculation result of this calculation is 100%, it does not mean that the level of fairness is truly perfect, because the assumptions about the level of needs of children, especially those that are non-material, are almost impossible to be accurate, whereas the assumptions it will be used as a basis for calculation.