Three Claims That Need Different Evidence
Coverage describes a stated service area or population under a particular definition. Connection means a household, building or outlet is physically connected under a stated rule. Reliable use concerns whether people can obtain a service of suitable quality, quantity, timing and affordability when needed. A map cannot establish all three.
Build on the wider urban service system. This explanation supplies no universal indicator or technical threshold. Any real report must state its own definitions, population, date and source.
Examine a Fictional Connection Claim
An invented Eastbank utility map shades a service zone containing 200 occupied households. A separate connection register lists 120 households. A small, nonrepresentative discussion with ten connected households reports evening interruptions and difficulty paying charges. None of these figures is a real operational finding.
The register suggests a connection ratio of 120 ÷ 200 = 60%, if its household identities, occupancy date and connection definition actually match the denominator. The map's shading does not make that ratio 100%. The discussion cannot tell us what percentage of all 200 households has reliable access; its participants were neither a census nor a representative sample.
Ask What Each Record Leaves Out
| Record | Narrow Claim It Might Support | Missing Evidence |
|---|---|---|
| Service-area map | The provider has drawn this zone under its definition | Actual functioning connections and access outside mapped boundaries |
| Matched household connection register | These households have a recorded connection | Functionality, payment ability, continuity and shared access |
| Supply logs | Recorded conditions at monitored places and times | Conditions at unmonitored outlets and the household's ability to use supply |
| Resident accounts | Specific experiences and barriers described by participants | Population prevalence unless collection and inference support it |
A shared water point also breaks the simple household-connection assumption: unconnected households may use it, while a connected household may still have no usable supply. Decide what service arrangement is being described before choosing a numerator.
Follow an Exception That Changes the Conclusion
Suppose 30 of the 120 registered connections are in vacant buildings. It would be wrong simply to keep 120 over 200, or to subtract 30 without checking the records. Reconcile dates, building-versus-household units and occupancy first. A repaired denominator can alter the connection estimate without proving any change in service.
Affordability, quality and continuity are separate dimensions. Do not invent a combined "reliable-use score" by subtracting several counts that may describe the same households. A person can face both interruptions and unaffordable charges.
The useful conclusion for the exercise is: "Mapped area and matched connections are partially described. Reliability and equitable use remain unresolved; specify relevant technical requirements, examine supply information and investigate access barriers through an appropriate, safe approach." This is more informative than claiming everyone inside the shaded area is served.
Use the area/household comparison to decide which scale of explanation the next inquiry needs.
Sources and Limits
UN-Habitat, Urban Basic Services, Objective and Strategy, discusses equitable service access beyond infrastructure expansion. UNHCR, Informal Settlements, Main Guidance sections 1-3, supplies displacement-related access and actor context. Consulted October 29, 2026. The latter is marked outdated/under revision and may be access-blocked. These are background sources; the definitions, arithmetic and all Eastbank facts above are original teaching material, not official measures or local technical advice.