Disadvantage of having Navigational Attributes

Hi there,
Pl. clarify the disadvantage of having a navigational attributes instead of low performance.
Regards
Sridevi

If a navigation attribute is used in an aggregate, the aggregate has to be adjusted using a change run as soon as new values are loaded for the navigation attribute (when master data for the characteristic belonging to the navigation attribute is loaded).
This change run is usually one of the processes critical to the system performance of a productive BI system.
This is why avoiding using navigation attributes, or not using navigation attributes in aggregates, you can improve the performance of this process. On the other hand, not using navigation attributes in aggregates can lead to poor query response times. The data modeler needs to find the right balance
Regards,
Sergio

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