Objective setting appraisal (OSA) queries related to ESS/MSS

Hello All,

I am currently working in OSA. I have few queries related to this.

My client wants to implement OSA without linking it to the SAP ESS/MSS. They have their own intranet portal which is not a part of SAP. But they are using it for applying leave etc which has been linked to SAP R/3. So they also want to use the the same portal for appraisal also.

Hence my query is whether is it possible to link OSA with their own inhouse intranet portal ? And if it is possible then how and will I be able to get all those functionalites which are available in standard ESS/MSS for OSA?

Please guide.

Regards,

Daniel