Just a suggestion.
I think it is better to include the Maintenance module in the Support module.
Reasons are:
- Maintenance is a support activities.
- Support can be internal (e.g. to assets) or external (e.g. as after sales service).
- There is Warranty Claim in both modules.
- Easier to reach maintenance menu if the support (from customer call, for example) required a maintenance scheduling.
Thank you.