One more little trick!
ODI objects such as Packages, Interface, Variable and Procedure scenarios can be regenerated without manually regenerating individual scenarios using OdiGenerateAllScen.
Drag in the OdiGenerateAllScen and select the Project and select Yes to Generate Package Scenarios and name it as Regenerate Package, similarly do so for other Object types and join them as shown below. The only advantage if you wish to regenerate just one object type you execute that particular step.
Else call it Regenerate and select yes to all the option so that regeneration of all the objects can be done at once.
Fast and simple!