System Reliability - HP Visualize b132L Technical Reference Manual

Temperature
Operating
Non–operating
Vibration
Operating random
Swept sine survival
Random survival

System Reliability

Estimated Annualized Failure Rate (AFR) is based on a parts count and the failure rates of those
parts in similar products. The AFR is estimated from the sum of the failure rates of the components
assemblies. A key assumption is that AFR is constant beyond the early life of the product and before
long–term wear out. Mean Time Between Failures (MTBF) is the reciprocal of the AFR. NO TAG
shows the AFR and MTBF of the B132L/B160L, with and without mass storage.
Product
B132L/B160L
B132L/B160L
Projected Failure Rate is the mature AFR, estimated from the failure rates of the components of the
product. The "Estimated Long–Term Annualized Failure Rate" is a future projection of an average
realistic failure rate beyond the typical infant failure period that occurs in the first few months of use
and before long–term wear out which occurs after many years of use. This product assumes an 8000
hour usage year, which is 91% duty. Actual customer experience may vary slightly.
System Specifications
Hewlett–Packard Preliminary and Confidential
Table 3–1. ATF and MTBF
Configuration
32 MB, no mass storage
32 MB, with mass storage
0 – 45 degrees C
–40 – +70 degrees C
0.21 G rms, 5 – 50 Hz
0.5 G peak, 5 – 500 Hz
2.09 G rms, 5 – 500 Hz
AFR
22.0%
25.5%
MTBF
39,818
34,350