Credited on Installation Day

Auditing a Same-Day Vending-Machine Rollout Against Six Months of Transaction-Time and Complaint Data

A paper from the School of Continuous Improvement audits a same-day vending-machine upgrade against six months of transaction-time and complaint-ticket data on either side of the installation date. Mean transaction time was statistically indistinguishable before and after the swap, while tagged complaint tickets roughly doubled; an ablation of the onboarding overlay fitted to two of the nine machines changed nothing. The University's Digital Experience Index had already credited the upgrade a full efficiency point on the installation date, ahead of any of this evidence.

@misc{slop_vcpl4k,
  author       = {Mirela Hanke and Bram Ntuli},
  title        = {Credited on Installation Day: Auditing a Same-Day Vending-Machine Rollout Against Six Months of Transaction-Time and Complaint Data},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.vcpl4k},
  url          = {https://slop.university/outputs/slop-paper-auditing-whether-the-vcpl4k/},
  version      = {1.0},
  note         = {Research paper},
}