The Quality/Technical Manager makes sudden Checks during the process of testing and writes his observation on the analyst's Testing register.

Analysts are subjected to proficiency tests (either internally or externally) i.e. one samples tested by the analysts is re-tested by another in-house analyst or by another established laboratory. The test may even be conducted on a standard reference materials. It is ensured that every analyst is tested for each area of his capability at least once a year. Frequency of such test is once in a month. Records are maintained. In case of difference between the two results being more than limit, the another sample from the same materials is got tested from an established laboratory. Full analysis for the difference is carried out after getting the results and appropriate corrective action is taken.

The purity of each samples made for testing is verified by one more analyst and approved only if the difference of two results does not exceed limit.

The non-conforming work may be detected at any stage i.e. start from collection of sample till the report preparation and issuance, of the testing and reported by any person of this laboratory during testing through Quality Checks, Surveillance Check, Internal Audit, Inter Laboratory Comparison.

The Calculation of test attached to the internal reports are verified by another analyst for correctness and are reviewed by the Quality/Technical Manager. The final report after typing is verified by the Quality/Technical Manager.