Rework Hours Quantified?

How do I go about quantifying the rework hours in the production summary? I am able to do a search of “rework hours” in the print preview for each individual assembly in the production summary. I am looking to get the total rework hours listed at the bottom of the production summary.

Any help would be much appreciated, If anyone has suggestions on how they quantify rework hours per operation, assembly, overall job etc. I am willing to learn