Best Practice for Writing to External Sources and Customer Tables w/in Delivered Components

PeopleTools: 8.53, PeopleSoft HCM FI/SCM 9.2

Given a requirement to update external data (in another system via an API) based on the action of a delivered component, what's the best practice for doing so?

My *guess* would be to use Integration Broker and create a custom transaction to asynchronously perform this action and then put this in a process scheduler job.

Given a requirement to update customer data (custom tables) based on the action of a delivered component, what's the best practice for doing so?

My guess would be the same as above.

Events

I think there's a way to do this customization with events, but i'm not sure what those are and how robust they are in 8.53 and 9.2.