The global priority is left blank and will be defined in a later phase.
As an example, user U2 (Maria Lopez) has declared that a query she will be
posing regularly is ???Number of monthly contracts per sales representative.???
Data Quality-Based Requirements Elicitation for Decision Support Systems
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc. is prohibited.
The entry in QRY_USR, for user U2 will be
24hs,50sec>.
???. Query.analysis: here we perform data recollection and validation against the
data dictionary. The goal of the former is the discovery of atomic data required
for satisfying each query defined in the previous step. However, initially the
QRY_USR form may contain queries with redundant, ambiguous, or even
incorrect terms. Thus, analysts and users review the queries and agree on a
(possibly) new set of queries, using the information obtained from the data and
aggregations dictionaries. For example, in query Q1 from user U2, the word
contracts will be replaced by the word sales, according to the information in
the data dictionary. These queries must be validated against the data dictionary,
and all terms not present in this dictionary must be added, using the form
DIC_DATA. This is a cyclic process, which results in a final QRY_USR form
where data referred in the queries are absolutely consistent with data in the
dictionaries.
Pages:
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168