PeopleSoft Update Manager
PeopleSoft Update Manager (PUM) is a lifecycle management process that is used with the PeopleSoft Update Manager PIA application, which runs on the PeopleSoft Image database.
PeopleSoft Images are Oracle VirtualBox virtual machines that you download locally. There is one PeopleSoft Image per product family (database instance) and they will be released periodically according to the image schedule posted on the PeopleSoft Update Manager Home Page. The PeopleSoft Image is the master source environment from which you will pull the updated objects, create a custom change package, and apply updates to your environment. The PeopleSoft Image for your application is cumulative so you will download the most current PeopleSoft Image and get all of the updates that you need.
The PeopleSoft Update Manager PIA Application and the PeopleSoft Image work together; the PeopleSoft Image contains the updates and the PeopleSoft Update Manager PIA Application is the searching tool and custom change package definition generator. PeopleSoft Change Assistant orchestrates the entire process flow. Change Assistant is the tool used to analyze and compare changes, to apply the changed objects to your environment, to add in your customizations, and to generate custom change packages.