I have never seen micro results labeled as "typical"... Seems sketchy to me. The only non-numerical result I would consider acceptable for micro results would still need to be based on clearly defined specifications, for example:
Method: APC
Specification: <1,000 cfu/g
Result: Within Specification
In the example above, "within spec" keeps their result confidential while still giving you the assurance that results are within the specification you agreed to when purchasing the product. Simply listing "typical" is not enough information for you. You need to ask them what their specification is for the test.
Hi Brothbro,
It's important to appreciate that the accuracy of results for, for example, APC are often +/- 50% or more ?
"typical" is often used in "short form" micro specs since most customers are unfamiliar with detailed micro. specifications.
Most (but not all) reference lists of micro specifications use the nmMc methodology due to the substantial intrinsic variation in data for many quantitative micro.quantities (plus variations due sampling/analytical micro.measurements) . Can see the various data compilations in the sublinks here -
https://www.ifsqn.co...ms/#entry183646
To put it another way, the concept of COA requires some careful thought if used for micro.purposes.
I have had more arguments with customers over microbiological results than any other Product "Quality" characteristics.