Metrology - USB part 2

Continuing with the discussion relating to Metrology and Universal Serial Bus (USB) cables.

Metrology - http://trewmte.blogspot.co.uk/2015/05/metrology.html
In the first discussion it raised the observations iso9001 has been mentioned and this standard provides a useful guide on record keeping. In most cases users take for granted that the cable/lead/plug is ok and just swap it out if it is