Does your existing test plan address everything that you want to test? Is it up-to-date? Is it specific? If not, you must revise your test plan appropriately.
If you are particularly concerned with the performance of a particular set of functions or with items such as the amount of system memory or database space the Identity Manager application consumes, then be sure that your test plan also measures these items.
After upgrading the Identity Manager product or after making any significant change to your Identity Manager configurations or customizations, be sure to retest your Identity Manager application.