Welcome to the forums! Might need more information about what you're trying to do, but based on the description in your post, I *think* OmniPlan can handle the kind of scheduling you're describing.
I'd take a look at
this wikipedia article; if the kind of charts that it describes would work for your purposes, OmniPlan should be up your alley.
(Slightly more OmniPlan-specifically: you should be able to model the dependencies between the processes just fine. Once you have the processes set up, your interactions with the processes would just be tasks that have you assigned as one of the resources required to complete them.)