QC Frequency Calculator
Analyst
Date
Analyzer
Test
Units
Levels of Controls Average
Concentration
Quality Requirement, TEa
Bias observed
Precision observed
Calculated Sigma-metric
Patient Risk Sigma
Applied Patient Risk Factor
Maximum Run Size
Candidate SQC Procedures Run Size 1 Run Size 2 Run Size Av
1:3s/2:2s/R:4s/4:1s, N=4 (Pfr=0.03)
1:2.5s, N=4 (Pfr=0.04)
1:3s, N=4 (Pfr=0.01)
1:3s/2:2s/R:4s, N=2 (Pfr=0.01)
1:2.5s, N=2 (Pfr=0.02)
1:3s, N=2 (Pfr=0.00)
1:3.5s, N=2 (Pfr=0.00)
1:2s, N=1 (Pfr=0.05)
1:2.5s, N=1 (Pfr=0.01)
1:3s, N=1 (Pfr=0.00)

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Westgard QC, Inc., 7614 Gray Fox Trail, Madison WI 53717
Call 608-833-47183 or e-mail us at westgard@westgard.com