Enterasys - Secure Networks

Skip to content

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

MTBF Help

---

Mean Time Between Failure

Prediction process, whereby an estimate in operating hours is calculated of an assembly's components to perform their intended function.

Enterasys Networks utilizes the Telcordia SR-332 Parts Count Technique for developing the estimate or prediction of the average life of an assembly.

---

Calculated MTBF

If a product contains n unique components, q_i is the quantity of the ith component, and r_i is its FIT Rate, then Calculated MTBF of the product is

---

FIT Rates

(acronym for Failures In Time) FIT Rate is a statistic for a component that measures how many failures the component will have per one billion operating hours. The lower the FIT Rate for a component is, the better the component is. FIT Rate is used to find Calculated MTBF.

Enterasys' vendors use the standard created by the Bell Communications Research Lab (Bellcore Standard) to define FIT Rates for their parts.

---

NOTES

Some table items contain the comment N/A in lieu of reported data. N/A (Not Available) may be attributed to any or more of the following factors:

1. A complete Bill of Materials was not available at the time of reporting.