Welcome
What are you trying to do?
A study for my organisation in engineering, manufacturing and quality.
Your path
Create the study and set the discipline
The discipline decides what every later page shows you.
Decide whether people are involved
If your data is about machines, facilities or finances rather than people, declare no human subjects and the data protection conditions do not apply. The declaration is checked.
Collect or import
Collect through ZStat with consent and withdrawal, or bring a CSV, Excel or SPSS file you already have.
Analyse and compare
Between sites, periods, groups or programmes - with the effect size, because significance alone does not tell a manager whether it matters.
Produce the assurance pack
Generated from your own installation, for a funder or a data protection officer.
What people in your field ask
Chart the process - establish stability - then and only then measure capability - test changes against it.
- Is my process stable?control chart
- Can it meet the specification?process capability
- Which machine, shift or operator differs?one way anova
- Two settings at once, and do they interact?factorial anova
- How long until failure?kaplan meier
Watch for: Drawing control limits from the specification. That chart cannot show the process drifting inside tolerance, which is the reason to draw it.
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