They could have conjured a standard, using the factors with the strongest correlation, distance conveyed, number of small medium large parcels, etc. It wouldn’t be perfect, no standard is, they are all simplified approximations, they work well enough for most routes most of the time. The standards for small vs medium vs large parcels share the same flaws for delivery as they would for loading. The drive speed matrix works pretty well most of the time unless you have dirt roads, hills, and winter vs nice roads in Florida. Loading, nominally 1/2 hour for an 8 hour route, so what if it’s off by five or ten minutes, not going to make a real difference. Parcels to door, measured as the crow flys, not the actual drive and walk distance, and ignore stairs and access doors. There is no time for casing dps but most carriers case. The engineers used the existing model of activities from the old legacy system, did not review if experienced carriers actually do those activities in those ways, carriers don’t. So they didn’t define loading, exactly because it is done differently by different carriers. So now with an undefined activity, it is actual time, problem is it is still undefined, and all across the US carriers are timing different sets of activities involved in loading and all calling it the same thing, when it isn’t. It’s ok if your in an office that allows your method, but what individual offices allow varies. Under the old system, you had to have a written explanation if the loading time was over 10 minutes, loading didn’t change, it is still actual time, but it went from 10 minutes to 30 minutes for majority of routes. I’d rather have load time calculated. As far as having just a few offices in the study, that is another problem, the number of offices required for statistical validity is more than the offices used, fewer offices were involved in the study than originally planned, the original number of offices was chosen for validity, but the study went on with far fewer offices. Rrecs was implemented without a beta test, 3-4 years later there is still no rrecs report showing daily data, there is no volume data per individual address, I’m much more concerned with not being able to validate if I’m getting the credit for parcels delivered and actual volume for 12 months after a realignment vs getting shorted 5 minutes on one time measurement out of some 30 odd measurements. The ball was dropped sooooooooo many times with rrecs.