Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Where the
world gathers for metal finishing
Q&As since 1989

-----

Definition of a "Lot" for plating process

August 24, 2011

I have a question for definition of "lot" for chemical process
Some customers define it 'All parts of the same part number processed during one shift in the same process line under identical conditions'

My question is that if I have 100 parts to be plated and I have to spilt up 2 (50 parts each time) because of tank size but all parts are processed in same line within 8 hours, are 100 parts considered "1 lot" ?
solutions are analysed periodically and always within control limit.

Sampling plan of lot acceptance test would be different depending on lot definition.

Best Regards,
D.J

D.J Kim
Engineer - South Korea

Technically it needs to be listed as two independent lots - something can happen in between the two processes that you may not be able to control or be aware of.

Sean Mackay
- Vancouver BC Canada
September 1, 2011

Why don't you ask your customer what definition or parameter he/she will accept?

Trevor Crichton
R&D practical scientist
Chesham, Bucks, UK
October 6, 2011

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: