A numerical trace: elapsed time is not hands-on time

Blank worksheet and worked example
Customer boundary: __________________________
Entry / delivery timestamps: __________________________
Recorded handling episodes: __________________________
Overlap and missing observations: __________________________
Elapsed / touch duration: __________________________
Next gap to investigate: __________________________

Completed example
Customer boundary: Request received → useful delivery
Entry / delivery timestamps: 09:00 → 11:00; same fictional day
Recorded handling episodes: 09:10–09:25; 10:00–10:20; 10:55–11:00
Overlap and missing observations: No overlaps in this teaching trace
Elapsed / touch duration: 120 min / 40 min
Next gap to investigate: 80 min outside recorded touch; not a waste claim

Elapsed: 09:00–11:00 = 120 min / Recorded touch: 15 + 20 + 5 = 40 min / Other interval: 80 min; explanation unknown