SAP SCM changing user specific characteristic description in planning book

Hi Expert ,

I would like to implement solution where characteristic description is user based in planning book .for example

User 1 see description 'XXXX' while user2 see description 'YYYY' for the same 'Zproduct' in the planning book/ dataview .

I do understand there will be some customedevelopment involve here .

could you please help me to understand what is best way to get this implmented or may be some BADI / userexit who  can help me to get this done .

Thanks