Cleaning Up Your Models And Cubes - IBM Cognos User Manual

In IBM Cognos, any categories that do not move under a different parent will have
the effect of a changed member unique name for that category. When reports that
directly reference this category or member are run, the report consumer will
receive an error. The report author will need to reassociate the category, or
member, to the newer version.
For more information about member unique names, see "Member Unique Names"
on page 22.
Procedure
1. Open the property sheet for the level that contains the categories affected by
2. On the Source tab, click Unique.
3. In response to the warning message that categories in the level must be
4. Click Move and click OK.
5. From the Run menu, click Generate Categories.
6. To check that the categories moved correctly, select the dimension in the
Example - Moving Categories When Source Data Changes
You must take special care to avoid inaccurate measure data in your reports when
categories in your model have moved from one location to another.
Suppose your organization has two staff members - Alessandra Torta in Milan
(Employee Number 5528) and Ellen Shapiro in Amsterdam (Employee Number
4125). After these two employees switch offices, you want the measure data
associated with them to move accordingly.
If you simply make the switch in your source data without specifying that the
Employee Number level is a unique level, Cognos Transformer generates two
categories for each staff member: the category under the former office and the
category under the current office. The measure values associated with each
individual remain associated with their former offices.
Procedure
The correct procedure is to specify that the employee number level is a unique
level, and the switch in location is a unique move, by clicking both the Unique
and Move check boxes in the Level property sheet for the employee number.
Results
Your users now see the correct results in their OLAP reports; each staff member
category is moved to the new office.

Cleaning up Your Models and Cubes

As you implement larger and more complex models and cubes, optimizing build
times and run-time performance becomes increasingly important. To maintain peak
performance, you should periodically reassess your model design.
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IBM Cognos Transformer Version 10.1.1: User Guide
the changed data.
recognizable by the source data alone, click Yes.
dimension map and click Show Diagram from the Diagram menu. Or verify
that measure values rolled up correctly by viewing the results in one of the
OLAP reporting components.