Is it possible to create a consolidated merit and promotion compensation plan?

Summary:

Aiming for the best experience for managers, we need to have a consolidated merit and promotion plan, but the employee's history must carry the correct motivation for action at the end of the cycle.

Content (please ensure you mask any confidential information):

Please, 

We are developing merit and promotion remuneration plans, but each separately in a plan.

Would it be possible to create them together and the reasons for salary changes be loaded into the history correctly for adjustment at the end of the cycle?

Example:

Once this plan is consolidated, we are unable to upload the reason for the employee's correct reason at the end of the cycle.