1. PT Provider Roundtable Chuck Wibby College of New Jersey February 26, 2004

3. NELAC Acceptance Limits Fixed Limits +15% Centered on assigned value (100% concentration) Regression equations Centered on expected mean recovery Regression equation SDs Combinations Centered on study mean Regression equation SDs

4. Regression equations

5. Y = mx + b a, b, c, d???? Predicted mean = (Assigned Value * a) + b Predicted SD = (Assigned Value * c) + d WS Acceptance Limits = Pred mean + 2 * Pred SD WP Acceptance Limits = Pred mean + 3 * Pred SD

6. Manufacturing

7. Verification

8. Homogeneity

9. Post Study

10. Stability

11. Post Study

12. Thank You! Chuck Wibby 303-940-0033, ext 201 cwibby@wibby.com Keith Ward 303-940-0033, ext 202 kward@wibby.com Ty Garber 303-940-0033, ext 213 tgarber@wibby.com