Determining the match weight ranges when using m-probabilities and u-probabilities is a little more complicated than using agreement and disagreement weights. To determine the maximum weight that will be generated for each field, use the following formula:
LOG2(m_prob/u_prob) |
To determine the minimum match weight that will be generated for each field, use the following formula:
LOG2((1-m_prob)/(1-u_prob)) |
Table 37 below illustrates a sample of m-probabilities and u-probabilities, including the corresponding agreement and disagreement weights that are generated with each combination of probabilities. As you can see, the range of match weights generated for a master index application with this configuration is from -35.93 to +38
Table 37 Sample m-probabilities and u-probabilities
Field Name |
m-probability |
u-probability |
Max Agreement Weight |
Min Disagreement Weight |
---|---|---|---|---|
First Name |
.996 |
.004 |
7.96 |
-7.96 |
Last Name |
.996 |
.004 |
7.96 |
-7.96 |
Date of Birth |
.97 |
.007 |
7.11 |
-5.04 |
Gender |
.97 |
.03 |
5.01 |
-5.01 |
SSN |
.999 |
.001 |
9.96 |
-9.96 |
Maximum Match Weight |
38 | |||
Minimum Match Weight |
-35.93 |