Workload Analyzer is a feature of ASE 16 sp02 - which is in beta currently - which is why you are coming up empty for docs. If you are in the beta, there should have been beta docs - if not, contact Vinod Chandran (vinod.chandran@sap.com) or myself (jeff.tallman@sap.com) for assistance. If not in the beta, and would like to participate, contact Vinod.
Thanks.