I made this a long time ago. However, you still might find it useful, if only for the examples of the formulas used.
There are no examples of the formulas referred to in this text in the working xl file, but you should be able to construct your own, based on the following information. Be aware that this methodology uses xlm in defined name formulas. Therefore, do not change the file type. Read all instructions before using.
You can download the instruction document and the working file here.