Navigational attribute in BW

Hi,

I need to generate Equipment costing report with periodic breakdown based on 0PM_OM_OPA_1 Cube.

This cube doesn't have Equipment as one of its characteristics. But Equipment is available as Navigational attribute of PM Order characteristics.

Is that a good practice to use Equipment (navigational attribute) for Equipment costing report with periodic breakdown

Advice me on this

Thanks in advance

arun