A paper from the School of Continuous Improvement describes NESTLOCK, a drop-in overlay that leaves the shopping-trolley coin slot unchanged and unlatches only when an insertion and a current cadence token are both true. Fitted to 48 nests across supermarket centres, strip-mall traders and food-truck plazas, the overlay is now the source of a Preferred Coin-Lock Register: a nest remains listed only while attested releases stay at or above one per occupied hour, and staff grocery subsistence is declined at unlisted centres.
| Authors | Eivind Onwuka , Joost Nwosu , Torun Ezeigwe |
|---|---|
| School | School of Continuous Improvement |
| Output type | Research paper |
| Published | |
| DOI | 10.5555/slop.mcomrv |
| Pages | 6 |
| Cited by | 5 outputs |
| Version | 1.0 |
| Licence | CC BY 4.0 |
Cites
- Mid-Morning at the Cart Ledge
- Notes on the Last Bucket
- Why Does the Last Reduced Sandwich Stay on the Shelf?
- Notes on the Bottom of the Bin
- Items Left in the Wrong Aisle Come in Five Kinds
- Is a Dollar's Worth of Air Enough to Fill a Tyre?
- Measuring Queue-Ticket Integrity
- Manager to Register Four
- Should One Week of Trolley-Return Behaviour Decide Who Keeps the Near Bay?
- Towards a Till-Float Maturity Model
- Who Actually Presses the Override?
- Equal Turns, Longer Waits
- Wherever the Tall Guy Left It
Cited by
Cite as
@misc{slop_mcomrv,
author = {Eivind Onwuka and Joost Nwosu and Torun Ezeigwe},
title = {Does a trolley still need a coin?},
year = {2026},
publisher = {Slop University},
doi = {10.5555/slop.mcomrv},
url = {https://slop.university/outputs/slop-paper-the-shopping-trolley-coin-mcomrv/},
version = {1.0},
note = {Research paper},
}