2.4 - Energy fieldwork: evaluating change and impacts
Use 2.4 analysis and evaluation to connect energy-survey records with photographs and reports. Learn to distinguish visible changes, reported behaviour and measured consumption before judging an enquiry's conclusions.
Processing energy-survey evidence
Keep quantitative and qualitative records linked to site, date and method. Tally closed responses, state valid totals, calculate shares and retain missing/don't-know responses. Compare EQS component scores using a radial or grouped/compound display with identical scales; locate sites in GIS alongside a relevant secondary layer. Qualitative annotations and interview themes preserve reasons that a numerical total can hide.
These original simulated records compare two streets in fictional Fern Ward. Each sample contains 20 respondents asked about their most recent journey to the street. The EQS uses 0–5, higher meaning better quality, with the same criteria and observation duration.
| Street | Walk/cycle | Public transport | Car/taxi | Noise score | Pedestrian score |
|---|---|---|---|---|---|
| Retrofit Street | 10 | 6 | 4 | 4 | 5 |
| Comparison Street | 4 | 4 | 12 | 2 | 2 |
Walk/cycle shares are 50% and 20%, a 30 percentage-point difference. Car/taxi shares are 20% and 60%. The EQS suggests better conditions at Retrofit Street during observation; it does not show that its numerical quality is a fixed multiple of the other street. A compound percentage bar makes travel composition visible, but sample totals must still be shown.
What different sources can establish
A constructed training extract from a fictional local energy report says: “Mean annual electricity use among 50 participating homes fell from 3200 to 2800 kWh after insulation and efficient-lighting work; no non-participating comparison was surveyed.” A distinct historic map records a new bus route serving Retrofit Street. An annotated photograph shows a widened footway, while an interview records that one resident now finds walking easier.
The report supports reduced electricity use among its participating homes: a fall of 400 kWh, or 12.5% from the original mean. It does not describe every home in Fern Ward. The map offers an alternative explanation for travel differences: bus access changed as well as the energy project. The photograph and interview help explain pedestrian conditions but do not measure electricity use. These are complementary kinds of evidence, not interchangeable proof.
Check whether times and locations match. If the report covers one winter and the questionnaire a summer Saturday, season and population differ. Weather, occupancy and energy prices can affect use independently of an intervention. A report's purpose and method matter more than simply calling it “official” or “online”.
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