How to set up a practical and appropriate control chart RSD?

Technical Topics Lab Investigation Report (LIR) How to set up a practical and appropriate control chart RSD?

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    How to set up a practical and appropriate control chart RSD, which is tight enough to provide good test performance control but does not cause unnecessary 2nd retest due to a too-tight RSD?

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    #5820 Reply
    Ryan Santiago
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    We used to evaluate our method RSD through method validation then compare this with published standards.

    We did 30+ runs of a control sample over several days then evaluate the repeatability and reproducibility, RSD, among other parameters. Some samples have different RSD from published standards due to matrix difference, other factors, but since we get comparable RSD and acceptable recovery (spike) from the run, we assume this to be the acceptable RSD for those specific samples.

    I hope this answers your question

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