The workflow actions within a workflow rule execute in the order in which they are created.
Once a sharing rule has been created to share Account records with Public Group A with read/write access to the shared accounts, then this sharing rule can be modified to share the Account records with Public Group B with read-only access.
If a Custom Summary Field/Formula is created in a Custom Report, then which operations can be performed by this field on any of the fields of the primary object or related object?
Field level security and record types work at