If you want to do the appraisal for the employees who is lacking with the access to the portal, you want an administrator who could be able to produce a hard copy form that at last will be sent to the employee and after generating a hard copy form the employee and the manager ought to fill their comments and ratings manually. If you want to input your form manually in SAP CRM with the help of back-end you would have to return the form to the administrator.
Let us have an example, sometimes the manager has access to the portal but the employees do not have, when an administrator has input the appraises self – assessment into SAP CRM on their behalf , an online form could be available to manager , remember if will depend up on your configuration and processes, it will help you for the appraiser, but for this the manager must have to reply back to the administrator or he has to print out a hard copy of the in process appraisal document to materially hand to the manager.
Thus all these steps you have to apply, but it would need the interference of the HR user to enter the minimum appraise details and may be the employee as well as the manager may not have the access to the portal.
At last you would have a download or upload option that will help you to use it by the employee and manager so that they can work on drafts of the appraisal, to work on them but it will work offline and finally you have to take the backup in to the portal once it has been completed. Hence, portal access is still the need for such functionality.
Hopefully this article might help you to clarify the appraisal situation.