William P. Rice, “A Gradient Risk Sampling Method For Performance Inspection and Preventive Maintenance,” Journal of Clinical Engineering, January/March 2003, pp 62–74.
Table 2, Row 11, Column 2 should read:
Sentence after Equation (33) should read:
The variance of Mi,j :VPM,i,j is proportional to (p2 /3ki,j 2).
References 5 and 6 should read:
5. Fennigkoh L, Lagerman B. Medical equipment management. JCAHO EC Series.1987;1:47–54.
6. Fennigkoh L, Smith B. Clinical equipment management. JCAHO PTSM Series.1989;2:5–14.