Hi, I'm new. Found this place while googling for an answer to this question: Is there any statistical basis for square-root sampling?
Background: We've just started bottling topical pharmaceutical solutions for a new customer and we're dealing with larger numbers then we have in the past. Our current procedures use MIL-STD-105D for sampling and acceptance criteria. We sample and check the empty bottles as they come in and then the filled bottles after they're done. Some in production have asked about square-root sampling since it involves fewer bottles to check (example: for 210,000 bottles received, Mil-105 says check 800, square root would be 458). From the couple relevant things I found via Google is doesn't sound like there is a statistical rational for using square-root sampling, plus there's no discussion about acceptance/rejection numbers.
Any help or advice is appreciate.
Thanks, Scott
Background: We've just started bottling topical pharmaceutical solutions for a new customer and we're dealing with larger numbers then we have in the past. Our current procedures use MIL-STD-105D for sampling and acceptance criteria. We sample and check the empty bottles as they come in and then the filled bottles after they're done. Some in production have asked about square-root sampling since it involves fewer bottles to check (example: for 210,000 bottles received, Mil-105 says check 800, square root would be 458). From the couple relevant things I found via Google is doesn't sound like there is a statistical rational for using square-root sampling, plus there's no discussion about acceptance/rejection numbers.
Any help or advice is appreciate.
Thanks, Scott