A completion assembly useful to fracture pack, gravel pack or otherwise treat production intervals traversed by an uncased wellbore is presented. The completion assembly may be used to stimulate production and/or prevent production of solid particles from the production intervals. A single trip method to fracture pack, gravel pack or otherwise treat multiple zones in an open-hole wellbore is disclosed where the wellbore has no liner or casing string installed through a production open hole portion.