How Oracle Policy Modelling works

Oracle Policy Modeling is an integrated development environment for developing rules and rule-based applications. It is used to build rulebases and screens for use by the Oracle Policy.

How does OPM works?

Using OPM, create a new project. In a project you can create a new Rule, Screen Definitions, Properties files, screen flow (will get into detail on how to define each of the following). Once all these are defined compile the Rulebase. Finally Oracle Policy Automation will run these rules either by using Web determination or Determination Server. 

Oracle Web-Determination can be defined as a UI Interface developed to run the rulebased defined using OPM.

Oracle Determination-server can be defined as a web service which provides the ability for remote client applications to send assessment data, perform inferencing based on the chosen rulebase and that data, and return the outcomes back to the requesting client. In Short this can be used when we are intending to integrate OPA with different Application.

NOTE: All the above given information is as per my understanding. if you have any suggestions or correction please post comment.