Ninety-Five Per Cent Is a Distance: Spare-Parts Travel, Maintenance Funds, and the Availability of a Village Hand Pump

For a hand pump with 180-day mean time between failures, 95 percent availability allows a 9.47-day mean repair time, crossed at about 80 km parts distance without local stock; a fund of about 203 USD per year covers repairs at 20 km, village parts stocking raises availability to 0.997, and downtime at 80 km costs about 366 USD per year in collection time. SIMULATED, NOT MEASURED.

Authors

Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-11-10
DOI
https://doi.org/10.5281/zenodo.24113287
Primary Topic
Reliability and Maintenance Optimization
Type
article
Field-Weighted Citation Impact
0.00
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article

Ninety-Five Per Cent Is a Distance: Spare-Parts Travel, Maintenance Funds, and the Availability of a Village Hand Pump

William Alexander Aldred
Zenodo (CERN European Organization for Nuclear Research)
Reliability and Maintenance Optimization
article

Ninety-Five Per Cent Is a Distance: Spare-Parts Travel, Maintenance Funds, and the Availability of a Village Hand Pump

William Alexander Aldred
article en

Abstract

For a hand pump with 180-day mean time between failures, 95 percent availability allows a 9.47-day mean repair time, crossed at about 80 km parts distance without local stock; a fund of about 203 USD per year covers repairs at 20 km, village parts stocking raises availability to 0.997, and downtime at 80 km costs about 366 USD per year in collection time. SIMULATED, NOT MEASURED.

Zenodo (CERN European Organization for Nuclear Research)
Reliability and Maintenance Optimization
DOIOpen Access PDFOpenAlex
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Ninety-Five Per Cent Is a Distance: Spare-Parts Travel, Maintenance Funds, and the Availability of a Village Hand Pump — William Alexander Aldred · Zenodo (CERN European Organization for Nuclear Research) (2026) | TGRS Research Map | TGRS