the results derive fromdata mining in stage 2 are fur-
ther reviewed in regard to the causes and effects. It is to identify
the service weaknesses and its causes. In this empirical case, rule
1 is selected as a target example for the review because rule 1 in-
volves the most citizen complaint cases (94 cases, see Table 2) with
the highest confidence level 100%. The 94 complaint cases are illus-
trated in the three aspects after one by one review the contents of
complaint raised by citizen. They are inadequate city construction
design, insufficient operation procedures and apathetic service
interface. The three aspects concurrently exist in the service sys-
tem which results in the 94 citizen complaints cases being raised.
The aspects are discussed in details as follows