What Every Engineer Should Know About Risk Engineering and Management

John X. Wang, Ph.D. Marvin L. Roush, Professor

2.9 Two basic modes of a radiation machine. In a real-time system like Therac-25, the software must operate at the speed demanded by the system inputs and outputs. The total time for the interaction de- scribed above was under 8 seconds. It turns out that this particular sequence of actions within this timeframe had never occurred in all of the testing and evalua-

of Maryland, College Park, MD

0.16 of insufficient water supply is P(G) = P(C n D) P(C)P(D/C) 0.1 0.9 P(FuG) 0.16+ 0.09 of reservoir size. By increasing of the reservoir, one could reduce both components of reservoir failure. Of

Left-Side Right-Side Fails Fails

of War Against Failures John X. Wang, Ph.D. Marvin L. Roush, Professor

John X. Wang, Ph.D. Marvin L. Roush, Professor of Maryland, College Park, MD

of G) is 3.5 times the size of the standard deviation of G. of failure is significantly reduced of the strength distribution is subjected to a load

4(3)

= min[L = min[L and note that L= 0 as required. To calculate the float times we use the equation get Table 9.3. Note here that all float times are:?: 0 as required. Project

JOHN X. WANG is Six-Sigma Quality Black Belt with GE Transportation Systems, General Electric Company, Erie, Pennsylvania. The author or coauthor of numerous professional papers on fault diagnosis, reliability engineering, and other topics, Dr. Wang is a Certified Reliability Engineer under the American Society for Quality,