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Sustainability Planning and Monitoring

Sustainability Planning and Monitoring

Sustainability Planning and Monitoring

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THE MPA IN ACTIONsuccessful or unsuccessful projects, regressionequations can not be applied to help predict whichinputs lead to better sustainability <strong>and</strong> use ofservices.4.6 Sampling proceduresThe sample size <strong>and</strong> rigor of sampling procedureswill vary with the purpose for which the MPA isbeing used, e.g., as a part of training formanaging water-sanitation projects, for casestudies, program planning, monitoring orevaluation, or research purposes, <strong>and</strong> dependingon whether a statistical analysis is required.For most evaluation research <strong>and</strong> monitoringpurposes, the number of communities in thesample would vary with the size of the project <strong>and</strong>the types of interventions it makes. The aim is toinvolve enough communities to provide a goodcross-section of the typical technical, social,economic, cultural, political, administrative, <strong>and</strong>environmental conditions in the project area,without confounding biases in selection.If overall conditions are homogenous, a simpler<strong>and</strong>om sample can be drawn. To do so, eachcommunity in the program(s) being sampled getsits own number, beginning with number one. Eachnumber is written on a separate slip of paperwhich is tightly folded. The slips are placed in abox or bag. They are stirred well until all havemixed. The required number of communities forthe sample (see below under sample size) is thendrawn from the container.The alternative is to use a table with r<strong>and</strong>omnumbers. Assuming that a sample of 40communities needs to be drawn for a programwith 600 communities, a numbered list ofnames is prepared from 1 to 600. To drawthe sample, one can start reading numbersin the table that consist of any three figures.The starting point may be anywhere in thetable. The first 40 numbers thus generatedbetween 1 <strong>and</strong> 600 are the numbers of thecommunities that will be contacted.Continuing until one has 50 communities thusidentified will provide a reserve in case of laterrefusals to participate.When conditions are heterogeneous, communitiesare grouped (stratified) according to their maincharacteristics. They are then selected at r<strong>and</strong>omin numbers proportional to their presence in theprogram. Box 16 lists some factors that may be ofBox 16 Possible factors for consideration in decisions on type of sampling● Environmental <strong>and</strong> technical conditions: type of water sources (ground <strong>and</strong> surface water),availability <strong>and</strong> quality of fresh water, water resources, developments in water <strong>and</strong> l<strong>and</strong> use,technologies used for water supply <strong>and</strong> sanitation.● Demographic conditions <strong>and</strong> developments: population size, density, growth, <strong>and</strong> migration.● Economic conditions: economic base (e.g. subsistence, cash crop, or industrial or services economy),communications (near major cities, well-connected or isolated), character of the settlement (ruralvillage, small market town, or low-income urban), economic growth.● Socio-cultural conditions: religious, caste <strong>and</strong> ethnic composition, male <strong>and</strong> female literacy levels,heterogeneous or homogeneous society, seclusion of women, etc.● Political <strong>and</strong> administrative conditions: decentralization <strong>and</strong> devolution, types <strong>and</strong> legal status ofwater <strong>and</strong> sanitation management organizations.(See example of sample selection criteria in the Lao PDR case study, Section 2 of this report.)35

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