Research Methods, Measurement, and Post-Occupancy Evaluation
Designs and methods
Quantitative designs include experimental (randomized), quasi-experimental (pre-post with a comparison unit or interrupted time series), and observational or cross-sectional studies. Qualitative methods - interviews, focus groups, behavioral observation, shadowing, and spatial mapping - explain why and how. Mixed methods combine both and are common in built-environment research, where true randomization is often impossible.
Measurement quality
Every metric needs an operational definition, a data source, a collection protocol, and a schedule. Attend to construct validity (are you measuring the intended outcome?), internal validity (confounders such as case mix, staffing, and seasonality), external validity, and reliability (would repeated measurement agree?). Baseline data must be captured before move-in; without it, most post-occupancy claims collapse.
Post-occupancy evaluation
POE is the systematic evaluation of a building in use against its stated goals. Levels range from indicative (rapid walkthrough and survey) through investigative (more rigorous, some objective measures) to diagnostic (full research, linked to outcomes). Typical timing is roughly six to twelve months after occupancy, once operations settle, with repeat measures to separate novelty effects from real change.
Bias traps
Hawthorne effects (people change because they are observed), selection bias, regression to the mean, and confounding by simultaneous operational changes. Comparing raw results to a national benchmark without risk adjustment is a frequent question trap.
Rule of thumb
POE is not a satisfaction survey. If it cannot be compared with a pre-occupancy baseline and a stated target, it is feedback, not evaluation. Design the measurement plan alongside the design.