deadline monitoring

Dear Community,

We have a group of requesters who want some sort of reporting on the number of projects delivered on time vs. delivered late. Is there any out-of-the-box solution for doing this? Completion date/duration aren't totally helpful, because our projects aren't considered complete until the invoice has been approved, so can be weeks after the delivery of the translation.

Would a parallel workflow for invoice approval be a potential solution?

Thanks in advance!