Asset Item Number (inventory number) - what level of detail / key functions driven off , and can you

Summary

When entering an Asset, you need to enter the inventory number and you can't seem to change it later. What functionality is linked to this number

Content

Hi

Is there any guidance on what level of detail the inventory item number should be set at, as appears you cant update on asset register once entered during the build phase.

Are there future enhancements that will rely on the inventory number such as the failure mode.