Question

Calculate availability and unavailability for a single and dual processor system with MTBF - 1500 Hours and MTTR = 3 hours The life of exchange is 20 years.​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

Step-by-step explanation:

The energy of system having MTBF - 1500 Hours and MTTR = 3 hours is

$\displaystyle U = \frac{3}{1500}$

U = 0.002

In 20 years of operation, total hours will be

h = 20 × 365 × 24 × U

  = 20 × 365 × 24 × 0.002

h = 350.4

Now,

$\displaystyle U_d = \frac{2 \times MTTR^2 }{ MTBF^2}$

    = $\displaystyle \frac{2 \times 3^2}{1500^2}$

$U_d = 8 \times 10^{-6$

In 20 years of operation total hours is given by

350.4  $\times 8 \times 10^{-6$

1.60 hours

The availability of a system in 20 years is 1.60 hours.

The unavailability of a system in 20 years is given by

Unavailability = 1 - availability

                      = 1 - (1.60 × 60)

                      = -60 hours