There actually is a process of beeing interrupted while working on a plane, which consists of retreat ( you carefully undo the last step you remember doing before beeing interrupted, checking you have all parts in the location they started out, protected against dust etc.). Then you make a note on the step you expected to do.

<Interruption>

<Return to work>

You start out three step before your last step.

You repeat/check those steps.

Its time intensive as hell, which is why the usual interruption to egostroke for meddle management does rarely happen in aircraft maintenance and production.