SP
If sub-equipment is not acceptable.
You could assign the class to the equipment multiple times (i.e. 20-25 class assignments)
Alternatively, take a look at user-exit ITOB0001 (via SMOD) in which you can build your own customer-specific screens for the equipment. If you use this option, then you may also need to create your own customer-specific report to display the data.
PeteA