IMBU is used by any organization operating many assets divided in machine-groups and location-groups. Examples are...
Oil and gas
Oil and Gas Operators who have a mix of pumps, compressors, turbines, diesel- and gas-engines divided through multiple field locations.
Mining companies who operate heavy machinery use IMBU to monitor availability & used capacity of their assets.
Rental companies use IMBU to check-out location & crytical operation parameters of their rental fleet. This may be aggregated contract-by-contract and can be used as a base for invoicing & contract pricing.
Any company owning a (large) number of assets, vital to their operation, may use IMBU to keep track of their performance.