Preserve the as-found evidence
Record the serial number, affected function, measurement point, reported error and uncertainty. Keep the original report and any later results following adjustment. Identify the limit and decision rule used for a conformity statement. Segregate the instrument under your own equipment-control procedure while the quality owner reviews it.
Follow the result to the jobs it could affect
Suppose an outside micrometer shows an error near the size used for one family of turned shafts. Use the issue register to find the dates and stations that had that particular micrometer. Find the inspection records for those shafts, then check whether the same instrument's other jobs used the affected part of its range.
The quality owner can record which lots need a closer review, who will review them and what evidence closes the action. Preserve the sign and units of the error when discussing earlier results. A bare note that the tool “failed” gives the reviewer little to work with.
Trace where the reading was used
For example, a pressure gauge may have checked two fixtures, but only one may have operated near the disputed point. Find the fixture records, batch dates and last satisfactory check, then ask the process owner to assess the affected work. Retain the owner’s decision and any reinspection record with the report.
If the gauge moves between tool stores at IMT Faridabad, list its movements as well as its present location. For work split between states, name the person who can retrieve each site’s records before arranging collection.