stuck at fault by table method

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vead

Joined Nov 24, 2011
629
I would like to know how we can analyze the fault using

look at this pdf file
I Image 1st
Fault-free function z = AB+CD
Faulty function zf = AB

Fault-free function z = AB+CD
Faulty function zf = AB+D


TABLE]


Rich (BB code):
A  B  C  D  Z   ZF
0   0  0  0  0   1 
0   0  0  1  0   1
0   0  1  0  0   1
0   1  0  0  1   0
0   1  0  1  0   1
0   1  1  0  0   1
0   1  1  1  0   1
1   0  0  0  1   0
1   0  0  1  1   0
1   0  1  0  0   1
1   0  1  1  0   1
1   1  0  0  1   0
1   1  0  1  1   0
1   1  1  0  1   0
1   1  1  0  1   0
[/TABLE]



Q1 how we will know that which part is fault A, B , C D , AB, CD
how to know which part is faulty ?


Q2 how to know which test vector cover maximum fault ?
 

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