To accurately calculate (and roll up) Hours on Tasks (and/or Issues) that cross weeks or months boundaries, I invite you to consider our just-released Resource Contouring solution. It provides an avenue for or the increasing number of people over the last few months who, similar to this post, are in search of a way to visualize and manage resources using rollup Hours by Day, Week, or Month with no “Special Math” required.
If you'd like more details, please email me at doug.denhoed@atappstore.com.
Regards,
Doug