Appraisal Employee to Boss

Dear All.

I am working with ERP 6.0 ehp6. I have active the BF HCM_ESS_WDA_1 & BF HCM_ESS_WDA_2

Is posible that using Employee Self-Service, an employee can appraisal to his boss?

If the response is Yes:_ What roles I should assign to employee?

Thanks,

Regards