A successfull plant turnover from construction up to commissioning startup requires a holistic approach and requires implementation of workflow methodology and management system to verify readiness for commissioning and startup. While project handover is covered under a "completion certifcate":

 The purpose of completions management is to manage by verifcation and record to come to readiness project phase for construction including pre-commissioning activities by system level - Ready for Commissioning. Compliance with design and engineering specifications. Verification of conformity is achieved by conducting inspections, checks and tests. Commissioning is the preparation for unit startup Ready for Startup preparation;system definition;create test packages;carry out checks;start on preparations;functional testing;PSSR Pre Startup Safety Review. start up Handover to Operations.