3-3.1 A definition for blocking precision.
Blocking precision is equal to matched records in query
blocks (MQ) divided by the sum of the matched records in query blocks (MQ) and the unmatched
records in query blocks (UQ).
| precision = MQ ÷ ( MQ + UQ ) | (3.10) |
With enough constraints it is pretty easy to determine how many queries there might be. To get a
handle on precision we might select only duplicates to use for queries and not use the query unless
there are data in the blocking fields. There would be just as many queries as represent duplicate
groups (G) in proportion as the data would be present (pi) and in agreement (ri).
 | (3.11) |
