Here we would like to draw your attention to WFM_SIS transaction code in SAP. As we know it is being used in the SAP CA-GTF (General Application Functions in CA) component which is coming under CA module (Cross Application).WFM_SIS is a transaction code used for WFM Scheduling Dummy in SAP.
It comes under the package CRM_WFM_CAS.
Transaction WFM_SIS technical data table
|Purpose||WFM Scheduling Dummy|