[Question] Janoshik — what am I missing here
Slightly embarrassed to be asking this, but: Janoshik — what am I missing here. A series across separate lots estimates a process. Repeat tests on one lot estimate the measurement. Both are useful and they answer different questions. Date of analysis anchors the result to a manufacturing period. A two-year-old result…
If the report gives a mass spectrum as well as UV purity, say so. Identity and relative quantity are separate claims and the log tracks both.
The template is vendor, compound, batch, service, claim, result, and who paid. Every one of those fields exists because a result missing it has been argued about here before.
Small fix — same supplier, different lot. The two rows in the log are not the same batch.
one result is a data point, agreement between two services is evidence
one result is a data point, agreement between two services is evidence
Adding the boring but useful bit: say whether you paid for it. It is the basis of the whole log.
inter-lab variance runs a point or two, plan your outrage accordingly