Have an employee with rheumatoid arthritis who claims she needs to sit on a stool for certain periods of time. This is ok with us to an extent. However we want to know how long she needs to sit on it so we asked her doctor to tell us that in his note. He did not. If he will not specify, can we argue that this is an unreasonable accommodation. Also, if he specifies but it is for a period of time that will cause us hardship, do we have to comply? Is there a standard for when this becomes an unreasonable hardship?