Dashboard
The decisions dashboard of Cockpit is the entry point for decision monitoring. It comes with a pre-installed plugin, which lets you see deployed decision definitions. Additional plugins can be added to the decisions dashboard.
Deployed Decisions

This plugin provides you with a list of deployed decision definitions. You can click on the name of a decision to go to the decision definition view and access more details, like the DMN table or executed decision instances view.
Deployed Decision Requirements Definition

This plugin provides you with a list of deployed decision requirements definitions.