Zedmeter°Proficiency testing
management & statistics.
Zedmeter is the platform proficiency testing organisers use to register participants, collect results and compute robust ISO 13528 scores automatically — the planning, the statistics and the report, without being a statistician.
Three steps, a few keystrokes
Collect
Set up a round and gather participant results — type them in or let each lab enter its own. A few keystrokes, done.
Compute
Zedmeter runs the ISO 13528 engine: robust assigned value, σ_pt, uncertainty and every performance score — automatically.
Score & report
Each laboratory’s z-score appears instantly. Generate a confidential, standards-based report in minutes.
The statistics engine does the thinking
Robust methods that resist outliers, the right score chosen for you, and every decision written on the report — exactly what an accredited scheme needs.
Robust by design
Algorithm A, Hampel, Huber, Qn, median — estimators that ignore extreme values. One outlier can’t distort the verdict.
The engine decides
Zedmeter reads the distribution, outliers and participant count, then recommends the right method — and documents it on the report.
Every score, automatically
z, z′, ζ and Eₙ per ISO 13528, with the correct one chosen for you. Satisfactory / questionable / unsatisfactory at a glance.
Outlier & normality checks
Grubbs and Dixon Q screening, Anderson–Darling normality with a plain-language verdict — the reasoning shown, not hidden.
Confidential reports
Per-round and per-lab reports with anonymised participant codes, charts and your logo — export to PDF in one click.
Built for providers
Run many schemes and organizations from one place, each fully isolated. Invite labs, collect results, publish.
Defensible, and documented
Assigned value by consensus (Algorithm A) or reference material, σ_pt by fitness-for-purpose, automatic z / z′ selection, and outlier and normality checks — all following ISO 13528 and ISO/IEC 17043. The method used is printed on every report, so your participants always know how they were assessed.
If a laboratory measures it, Zedmeter can score it. Reference-material producers use the same engine to characterise their materials.
Know your z.
Turn a column of results into standards-based performance scores — automatically.