We peen some aluminum parts (non-aerospace) that are peened 6-12N using AGB-18 glass bead. There are several parts, but for the sake of this story, let's say we have part A and part B.
For part A, the operator runs a set of Almen strips before processing, and a 2nd set after processing. He's now ready to run part B. He was trained by me to do the same thing, run a new set of strips before and after processing. However, someone decided that part A and B are "similar enough" and that they could be treated as one "lot" of parts and therefore one set of strips (before and after) would suffice for both parts. This saves them 10-15 minutes of time.
I don't agree with this thinking. We keep the strips for our customer should they ever want evidence of peening intensity, but now I've got no "after" set of strips for part A, and no "before" set of strips for part B. The paperwork is there, and it's all in the logbook, but I've got no hard evidence.
AMS2430 sect 4.2.1 states that "intensity verification shall be performed at the beginning and, for lot sizes greater than one, at the end of each lot or every 8 hours, whichever is less."
So I guess it's how you interpret the meaning of a "lot". Sect. 4.3 helps define this a little, and sort of supports their thinking, but I still don't like it. Can someone help me out here?