scratching my head here
What is it that you're trying to figure out specifically here? Demonstrate that the MDD is too inaccurate to register a stop? The engineering report put in 'slop' to handle the 'noise' of fixes for registered stops. And as the engineers specifically noted, the fewer terrestrial fixes to compliment satellite signals, the much more likely the distance between boxes and the easier to fix those boxes to mapped points already in the system.
The majority of 'coverage' calculations comes from mapped addresses in AMS linked through delivery point sequencing. With the improvements in package identification and the mandating of mailers providing their own addressing rather than simply depending on OCR decoding, as the engineers predicted in their reports, more and more data will not be required from the MDD as more and more data is generated at the network level.
The biggest 'hole' I'm seeing in the system at the moment that's not being accounted for is non-trackable mail being picked up at boxes and I've already seen some suggestions on the national level on how to address that to give credit to routes and stations where it's coming from. The blind spot of locally sorted mail being registered for station and route credit is yet another datapoint that probably will have to be accounted for in spot checks during the year.
End result will be just fudging the numbers by another percent in coverage most likely. But we've honestly spent very very very little effort on a national level to identify how much mail is being sorted at the office to go back out to routes in raw mail. And honestly, the more efficient the station, the more likely that percent is being missed, but on the macro level? It's money not being paid, but it's panning for the most fine gold dust, less than 10 minutes of standard evaluation a week? The cost to verify those numbers would probably make the most proactive response by both the union and USPS to just simply say 'routes that fit the following model will have 10 minutes of standard time added to their routes per week.'
I'm not saying it's not worth going after, 10 minutes can change an evaluation up a level.
And by the by, if you want similar data to what the MDD is capturing in a visual format, sign up for a Waze account, use it each day, and you'll see very similar bead crumb trails to the MDD heartbeat marked on the map in the edit mode. Location services turned on with Google maps? You also can get a very similar aGPS trail as well.