So many mis-conceptions about timestudies. It is actually called elemental time study. The observer measures the characteristics of the delivery and pickup stops. How fast or slow the driver works makes no difference. The quality of the load and how long the driver takes to select packages makes no difference. Every action is classified, and a pre-determined allowed time is applied.
There is no such thing as sorting time in package select, there never has been. You are allowed 12.5 seconds per package, (.00352 hours) for package handling. This includes the recording time. This is not a variable the time study even measures. This is calculated daily from the total delivery packages recorded in Diad.
What the time study measures is "what did the driver need to do at each stop?" How long were the walks, was a hand-truck needed, did the driver have to knock and wait for a signature? What type of delivery, Signature, DR, NI1? How many and what types of traffic delays did the driver encounter. They all have a pre-determined time. All of the time for each stop is totaled by unit, no matter which driver was measured. The total time is divided by the number of stops in the unit to get the unit stop allowance.
The stop allowances are a part of the calculation for the drivers planned day. Add to that fixed AM, PM, package handling, COD's, over 70's, fueling, call tags, and other items, and a complex travel calculation and it will produce a planned day.