Perhaps this functionality could be incorporated into a previous feature request titled "Require a Sitter to Include Reason For Declining a Visit".
It would be helpful to be able to track the percentage of times a psdw accepts/declines jobs as compared against their availability schedule.
These metrics could be used to develop performance indicators for psdw's, facilitate efficient job assignment across psdw's as well as provide valuable data points for owners regarding retention of psdw's that are essentially taking up space on the roster.