NATURAL Engineer "Object Statistics"

Hello there… Can anyone shed some light on the “HalTime” metric in the NATURAL Engineer “Object Statistics” report? I have found reasonably good explanations for all of the other “Halstead metrics”, but the Time metric seems to be a mystery to many, surely to me. Does anyone know: What are the units that the number represents (secs, mins, hrs?), and “time” to do WHAT, exactly? Any help is surely appreciated. I have to explain this to people. :?