Most established labs have a procedure in place. The more "robust" labs have access to GIDEP, where there's 1,000's of procedures, so I'm not really not in need of a procedure.
I'm sure I'll get differing opinions on this, but most of the Air force procedures are ISO17025 compliant, with the Issue of uncertainty being the biggest sticking point. I think that even that isn't a big issue.
The rule of thumb for tension is from 2 to 3 gentle turns. I've been through the Air force as well as NAVY and Mitutoyo training, and not suprising I was taught differently at each.
So, in general terms I would imagine there may be a market for procedures, but I think it would be a small niche.
Thermometers can get to be a bit involved, given the various standards that are available. I think, IMHO, that this may be very problematic.
Would you offer a "garantee" of sorts that the procedure would be compliant to some standard? if so, then your going to have to resolve this with the various certifying agencys, I.E. A2LA, NVLAP and LAB.