Services

The list a ticket can optionally be filed against — hosting, domains, billing, whatever a customer's request concerns for your business.

When you would use this: to see or report on tickets by what they are actually about, beyond department and priority.

Adding one: a name. A service is optional on every ticket — "no service selected" is a normal, common state, not something to chase down.

Retiring one: deactivate rather than delete a service that already has tickets against it; a deactivated service stays on those tickets' record and simply stops offering on new ones.

When it refuses: needs the same lookup-table permission as ticket statuses and priority labels; a service carrying tickets refuses outright deletion until you deactivate it instead.