Hi Isabel,
As far as my opinion is concerned, it is a good idea, but there are a few points to be considered before that:
Firstly, you should be aware of what exactly HUMAN RESOURCE is. I am saying this because you stated that you are new to this field.
For the appraisal system, you really need to know everything about it because you are going to sell it, not just use it for your company.
Regarding Performance Appraisal, you should also know everything about Training and Development (T&D) as it will help you compare and identify performance.
With all these points in mind, this is a nice idea, and you can definitely go for it.
Regarding your question about this in our country, yes, we have many top placement companies that are selling almost all the functions to many major companies.
Best regards,
Dips