| Sample | Batch | Tests | Waiting |
|---|---|---|---|
| S-2291 | B-121 | 4 | 35 min |
| S-2292 | B-122 | 5 | 20 min |
| S-2287 | B-118 | 1 retest | 2 h 10 min |
Every sample registered, every test planned by grade.
A sample is drawn for each batch, labelled, and given the tests its grade and standard require. The lab sees what is waiting and what needs a retest.

