
266 ◾ System Instantaneous Availability
9.5 Operation Phase
In the case of no preventive maintenance, suppose the service life, repair time for
repairable maintenance, and logistic delay time follow the probability distribu-
tions Weibull(α
1
, β
1
), Weibull(α
2
, β
2
), and Weibull(α
3
, β
3
), respectively, and the
truncated points are n
1
, n
2
, and n
3
. Use the cost constraint C
3
. e constraint
(λ, μ, ρ) ∈ Θ
3
on system failure rate, repair rate for repairable maintenance, and
logistic delay rate follow Weibull distribution, and suppose Θ
3
is affected by the
demonstration factors (α
1
, β
1
, α
2
, β
2
, α
3
, β
3
). Assume the constraint set of these
demonstration ...