[70 copo]

I am pretty protective of the book research but for the sake of giving you an answer here is an excerpt from the book "Echoes of Norwood" © 2013 Philip Borris


<span style="font-style: italic"><span style="font-weight: bold">&quot;The audit report was structured to capture quality deficiencies known internally as “classed demerits”. Defects that were identified as part of the audit were assigned class “A”, “B”, “C” and “D” respectively. The class “A” defect had a demerit value of 20 and was considered to be one that if left uncorrected “would or could adversely affect the personal safety of the occupants or the public in general”. When a class “A” defect was encountered on an audit an immediate check was made on the entire production system. The first step was to put a 100% check into effect at or as near as possible to the specific production operation involved. <span style="text-decoration: underline">The evidence of the of the 100% check remained on the affected components of the cars typically as an inspector’s mark with a crayon or a daub of paint indicating that the deficient assembly operation had been performed properly to the production specification. The second step is to then check twenty-five completed vehicles for the continuing presence of the defect. This check begins at the point where the 100% inspection was established and covers the twenty-five units that had just been assembled&quot;</span>. </span></span>


There was little rhyme or reason for inspection marks and as you can see why as they were the random product of the quality process.

Attached is the quality Metric page from June 1969 Enjoy!