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c) Estimation Of Total Imprecision
1. Calculate Total Imprecision (SDT)using the following equation :
− 1
2
2
= � ∙ +
Where n= number of replicates per day
2. Calculate Total CV (CVT)using this equation :
= × 100
3. Compare with
i. Manufacturer’s claimed total CV (CVMT) &within run CV (CVMWR)
d) Evaluation Of Imprecision
1. Compare the calculated CVWR and CVT with the manufacturer’s claim CV
• If CVWR and CVT< manufacturer’s claim, preliminary evaluation is accepted.
• If CVWR and/or CVT>manufacturer’s claim, perform verification of manufacturer’s
claim
