Design Innovation Paper

Village Drill: A Case Study in Engineering for Global Development With Five Years of Data Post Market-Introduction

[+] Author and Article Information
Christopher A. Mattson

Department of Mechanical Engineering,
Brigham Young University,
Provo, UT 84602
e-mail: mattson@byu.edu

Amy E. Wood

Department of Mechanical Engineering,
Brigham Young University,
Provo, UT 84602

John Renouard

South Jordan, UT 84095

1Corresponding author.

Contributed by the Design Innovation and Devices of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received June 17, 2016; final manuscript received March 6, 2017; published online April 12, 2017. Assoc. Editor: David Myszka.

J. Mech. Des 139(6), 065001 (Apr 12, 2017) (10 pages) Paper No: MD-16-1449; doi: 10.1115/1.4036304 History: Received June 17, 2016; Revised March 06, 2017

This paper presents a case study in engineering for global development. It introduces the Village Drill, which is an engineered product that has—5 years after its introduction to the market—enabled hundreds of thousands of people across 15 countries and three continents to have access to clean water. The Village Drill creates a 15 cm (6 in) borehole as deep as 76 m (250 ft) to reach groundwater suitable for drinking. The case study presents facts for the actual development and sustaining and are unaltered for the purpose of publication. This approach provides the reader with a realistic view of the development time, testing conditions, fundraising, and the work needed to sustain the drill through 5 years of sales and distribution. The purpose of the case study is to provide sufficient and frank data about a real project so as to promote discussion, critique, and other evaluations that will lead to new developments that inspire and inform successful engineering for global development. As part of the case, the paper describes six fundamental items: the product, the customer, the impact, the manufacturing, the delivery, and the revenue model of the drill.

Copyright © 2017 by ASME
Topics: Drills (Tools) , Water
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Fig. 1

Village Drill: (a) in use in Tanzania, (b) description of basic function, and (c) detail of drilling bit and chip removal

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Fig. 2

Timeline for product development and delivery/drilling milestones

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Fig. 3

The major subsystems and parts of the Village Drill. The structure divides into five parts; the base, the boom, the wheel support, and two vertically oriented beams to give the boom height. The input wheel has a center hub (welded) with eight spokes that extend from it and are secured by eight cross members. The drill string includes the swivel, Kelly bar, and many short (meter-long) pipe segments and couplers that are added to the drill string as the borehole deepens. The Village Drill disassembles into the pieces shown for transport to and from the job site.

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Fig. 4

Time series plot showing productivity measures and wells in service

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Fig. 5

Time series plot showing the primary impact measures. The total number of people-months of water served is 4,129,945. The number of people who have access to a well (at time period 65 (nt = 65)) with a functioning pump equals 188,176, while the number of people who could have access to water if all pumps were serviced equals 316,281.

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Fig. 6

Time series plot showing incomes and cashflow. Zero income shown as baseline.

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Fig. 7

Histogram resulting from the uncertainty analysis carried out on the cumulative number of people-months of water provided (npmws). The mean and standard deviation for this data are shown in Table 2.




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