View previous topic :: View next topic

Curious Guest!
Guest	Posted: Sat May 22, 2026 5:19 am    Post subject: Calculating PPM   Hi, I am a new QA Engr and have been asked by my manger to establish a PPM calculation methodology for our outgoing QC test. Do I have to use certain confidence limit i.e. 60%, 90% to come up with the methodology? Or just have to use the simple calculation for parts per million? What do you recommend? Am I thinking too hard for a simple problem? Any suggested reading? Thanks for your help. Rgds, Curious Guest
Back to top

Achilles
Guest	Posted: Mon May 24, 2026 5:01 pm    Post subject:   Curious Guest, What you probably need is this: EIA Standard 554 - Method Selection for Assessment of Nonconforming Levels in Parts Per Million (PPM) (ANSI/EIA-554-A-96). The spec can be bought online. I don't know if you can find something off the net for free that explains this. Achilles
Back to top

Choose Display Order

Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First

User Permissions

You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum