With the use of PAM and service catalog, in the context of multi-selection in the service, we are able to open several tickets all attached to the request. You can manage each status by option and also validate when the 3-4 tickets are completed. It is ideal to carry out a request with multi-team.
I suggest you start the creation of a simple process with OOTB operators already supplied by CA when integrating with the Catalog and SDM. Quickly you will be able to open tickets in SDM and to get more flexibility.
Once the simple process is functional, it becomes much easier to add features to users (ex: passing form information in SDM, adding note to opening, attachment etc...)