We have a semi-regular consultant who has helped with production and quality issues for approximately 3 years. Last visit, he noticed that we have several tape measure on the floor that are not numbered/labeled. I told him that they are not used for product validation, just for internal use for non-customer-specific instances. None of the actual auditors (TS16949) have ever brought it up, so I'm inclined to ignore this, but he suggested numbering all of them and labeling them 'reference only'. My main issue with this is that we will almost certainly miss one or two, leaving us open to an unnecessary finding. Anyone have a reason to follow or dismiss his advice?