Publications
Publications
White papers, research notes and articles
By Erik van der Werff, on measurement uncertainty, statistics and gas analysis.
21 October 2026 · Research note
Structured heteroscedasticity in errors-in-variables calibration
A proposal for errors-in-variables calibration: describe the response variance by one variance function estimated from all replicates together, and keep the reference uncertainties as given. Not peer reviewed.
12 October 2026 · White paper
Not rejected is not proven
Why the absence of evidence against a result is not evidence for it, and what that means for conformity decisions, method comparison, calibration and analyser evaluation in gas analysis.
23 May 2025 · Article
Bayesian statistics and AI
How they transform analytical measurements: why measurement uncertainty is more than a single number, and why correlated errors matter. First published on qualimetric.eu.
22 May 2025 · Article
Rethinking measurement
Smarter, deeper, better: how multi-sensor data, Bayesian statistics and affordable computing change the way we measure, monitor and decide. First published on qualimetric.eu.