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Multiattribute acceptance sampling plans - Library(ISI Kolkata ...

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S 0 denotes the summation with respect to x i ’ s over the domain indicated in the line preceding<br />

line and, a′ j + l<br />

= a<br />

j + l<br />

− a<br />

j<br />

for l = 1 , 2,...,<br />

r − j and<br />

D 1 is obtained from N 1 by replacing<br />

m′<br />

i<br />

by m i .<br />

…. (2.3.8)<br />

Let,<br />

i=<br />

r<br />

S ∏ h(<br />

x , m′<br />

)<br />

0 i i<br />

i=<br />

j+<br />

1<br />

W =<br />

.<br />

i=<br />

r<br />

S ∏ h(<br />

x , m )<br />

0 i i<br />

i=<br />

j+<br />

1<br />

The ratio of the first term of to the second term of (2.3.8) can be written as<br />

a j<br />

= ( γ<br />

2 / γ ) Exp(<br />

-(<br />

m'-m))<br />

.(<br />

m ′<br />

1<br />

(j- 1) / m(j-<br />

1) ) .W . The theorem is proved if we can show<br />

that this quantity is greater than 1 under the given condition.<br />

Now,<br />

( j )<br />

a j<br />

∆ PA = PA ( a1 = ... a<br />

j − 1<br />

, a<br />

j<br />

+ 1, a<br />

j + 1<br />

, a<br />

j + 1<br />

,...., ar<br />

; m<br />

1 ,..., mr<br />

)<br />

j ) (a j<br />

- PA ( a1 = ... = a<br />

j<br />

; a<br />

j + 1<br />

,..., ar<br />

; m1<br />

,..., mr<br />

)<br />

a′<br />

−1<br />

j + 1<br />

a′<br />

r<br />

−1−<br />

( x<br />

j+ 1<br />

+ ... + xr−<br />

1<br />

) r<br />

= g ( a<br />

j<br />

+ 1, m ( j )<br />

) ∑<br />

∑ ∏ g ( x i , m i ) …(2.3.9)<br />

x<br />

x = 0 i=<br />

j + 1<br />

( j )<br />

j + 1=<br />

0<br />

∆ PA and ∆ QA,<br />

when used in the regret function lead to the regret difference<br />

( j )<br />

a j<br />

denoted as ∆ R )<br />

a j<br />

(<br />

1<br />

r<br />

( j )<br />

∆ ( R1 ) ≥ 0 ⇒<br />

a j<br />

j + 1<br />

i=<br />

r<br />

i=<br />

r<br />

( γ<br />

′<br />

∏ ′<br />

2 / γ<br />

1 ). Exp(-(<br />

m'-m)).(<br />

m(<br />

j ) / m(<br />

j ) ) S1<br />

h(<br />

xi<br />

, mi<br />

) / S1<br />

∏ h(<br />

xi<br />

, mi<br />

)<br />

i=<br />

j + 1<br />

i=<br />

j + 1<br />

≥ 1.<br />

…(2.3.9a)<br />

S denotes the summation with respect to<br />

1<br />

Note that the set of tuples ,..., x )<br />

(<br />

j 1 r<br />

x i<br />

' s over the domain indicated in (2.3.9).<br />

x +<br />

coming under<br />

of x ’s coming under S<br />

i<br />

0<br />

(call this set as T 0 ).<br />

Let T 2 = T 0 – T 1 . Let S 2 denote the summation on all<br />

S (call this set as T 1 ) is a subset<br />

1<br />

x combinations appearing in T 2 .<br />

i<br />

99

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