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Problem 7-22
Satellite Radio Reliability
Exponential Probability Distribution
Enter data only in yellow-shaded cells.
Failure rate per hour (λ) = 0.000015
Hours 12000
Calculated probability 0.164730
T = x Cumulative Failure Reliability
Hours Probability F(x) 1-F(x)
0 0.000000 1.00000
137500 0.872864 0.12714
150000 0.894601 0.10540
162500 0.912621 0.08738
175000 0.927560 0.07244
187500 0.939945 0.06005
200000 0.950213 0.04979
212500 0.958725 0.04127
225000 0.965782 0.03422
237500 0.971632 0.02837
250000 0.976482 0.02352
0.000
0 50000 100000 150000 200000 250000 300000
Hours to Failure
Hours to Failure
Reliability Function
100000 0.776870 0.22313
112500 0.815019 0.18498
125000 0.846645 0.15335
