106 ◾ System Instantaneous Availability
According to eorem 5.12, the rank of matrix I – B is n
1
+ n
2
+ n
3
+ 2. en,
…
…
…
∏
∏
∏
∑
∑
()
() ()
()
()
() ()
()
()
()
()
=−λ
=−λ
−λ
=−λ
=−µ
=−µ
−µ
=−µ
=−ρ
=−ρ−ρ
=−ρ
µ−
−=
ρ−
+
=
−
++ +
=
−
++ ++
++ ++
++
+
=
−
++
=
+
++
=
+
10
1011
1
10
1011
1
[1 (0)]
[1 (0)][1(1)]
1
10
.
21
0
1
0
1
0
1
11
1
1
1
1
1
1
12 1
1
12 12
12 12
12
2
3
1
2
12 1
3
xx
xix
xx
x
x
xi x
xix
n
i
n
nn n
i
n
nn nn
nn nn
nn
n
i
n
ni
i
n
nn
i
n
In other words,
∏
=−λ=
=
−
xjxi n
i
j
i
[1 ()], 2, 3,
0
2
∏
=−µ=
++ +
=
−
xjxi n
ni n
j
i
[1 ()], 2, 3,
122
0
2
11