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How to measure DPPM in Chemical batch manufacturing

patilrahuld

Starting to get Involved
#1
Hello

I have a question relating to DPPM measurement. We have two product lines where we make bulk/continuous production, where measurement of DPPM is rather simple. But we also make chemical batches where we don's have a matrix for DPPM. Does anyone know how they measure DPPM in chemical batch manufacturing.
Background- we make a batch using three four ingredients (add them in certain proportion) and after mixing it becomes a final product. I was thinking that a good matrix would be first pass acceptance (FPA) instead of DPPM.

Thoughts?
Rahul
 
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Jen Kirley

Quality and Auditing Expert
Staff member
Admin
#2
Good day Rahul,

Since a defective batch can be such a large quantity and the number of batches produced in each period may be relatively small in number, DPPM does not seem like a sensitive enough metric. All of my chemical producing clients used first-time pass.
 
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