Actions in QTP

There are three types of actions in QTP
1. Reusable Actions: An action that can be called multiple times by the test with which it is sotred (the local test), as well as by other tests.
2. Non-Reusable Actions: An action that can be called only in the test with which it is stored, and can be called only one.
3. External Actions: A reusable action stored with another test. External actions are read-only in the calling test, but you can choose to use a local, editable copy of the Data Table information for the external aciton.

By default, new actions are non-reusable.