SSM 10.1 - Attributes X KPI

Hi SSM 10.1 Experts,

for people who have worked with this SSM 10.1 version, I want to ask you if is there any restriction about creating

attributes for KPI, the client requirement is that each KPI must contain a lot of details, I got another question about

if it's possible to create new measure units as a detail of a KPI.

Thanks a lot.