BRF rule with own partner functions

Hello experts,

we are setting up the service desk for itsm and create some own partner functions like service owner.

Now we want to determine the new partner functions about a BRFplus rule. Currently we use the dispatch button and this works.

I read this document https://websmp102.sap-ag.de/~sapidb/011000358700000514582011E/ITSM_Guide_RuleEnginefinal.pdf

and do the configuration for the support team determination..this works.

My question is, how can we implemnt our own partner functions into the BRFplus decission table?

I hope you understand my question...we would be very glad if sombody can help us.

Thank you for reply.

robert