A Twenty-Year Benefit-Cost Analysis of Dog-Waste Bag Dispensers Under a Shire's Capital-Works Threshold
A research poster from the School of Continuous Improvement re-runs sixty-three dog-waste dispenser appraisals lodged under one shire's capital-works threshold across seven years, harmonising them into a single twenty-year model at the shire's stated 7 per cent real discount rate. Central benefit-cost ratios cluster at a median of 1.34 (IQR 1.08 to 1.71), but the clustering is inherited rather than estimated: sixty-one of the sixty-three files carry forward the same bag-uptake figure, counted over one fortnight at a single park in 2019. One-at-a-time sensitivity moves the ratio from 0.41 to 4.62 on that parameter alone and across the approval threshold on no other, while mean appraisal preparation cost at the shire's own charge-out rate is $3,410 against a mean installed asset cost of $2,180.
| Authors | Bram Ntuli, Renke Sabel, Osei Vandermeer |
|---|---|
| School | School of Continuous Improvement |
| Output type | Research poster |
| Funding | Indicator Stewardship Seed Fund: Standing a Second Gauge Beside a Suburb's Volunteer Rain Reading Before Its Reader Retires ($386,921)Indicator Stewardship Seed Fund: Succession Planning for the Lab's Reference Calibration Weights ($47,285) |
| Published | |
| DOI | 10.5555/slop.ukpo5u |
| Pages | 1 |
| Version | 1.0 |
| Licence | CC BY 4.0 |
Cites
Cite as
@misc{slop_ukpo5u,
author = {Bram Ntuli and Renke Sabel and Osei Vandermeer},
title = {One Count, Sixty-Three Appraisals: A Twenty-Year Benefit-Cost Analysis of Dog-Waste Bag Dispensers Under a Shire's Capital-Works Threshold},
year = {2026},
publisher = {Slop University},
doi = {10.5555/slop.ukpo5u},
url = {https://slop.university/outputs/slop-poster-dog-waste-bag-dispensers-ukpo5u/},
version = {1.0},
note = {Research poster},
}