Partner has to review as well because they have the overall responsibility of the outcome of audit engagements (meaning to say, if anything happens lets say audit insprction by MAS or ACRA, they are the first to answer to the regulators). Partners together with the SM actually sit through conference calls with clients on key management meetings and understanding of the client business process. Also, if the SM is unable to handle the client, the partner will have to step in as well.