Harvey Maylor created a project life cycle model based on four discrete and sequential stages. This is known as the 4D model. One of the stages involves the following activities:

- Documentation must be completed. Contracts, letters, accounting records etc. must be filed properly.

- Project systems must be closed down, including accounting systems - only after all costs have been settled.

- Handover to the client/end users must take place, and where appropriate obtain sign-off to signify that the contract is complete.

- Review the project to provide project staff with immediate feedback on performance.

To which stage of the 4D model do these activities apply?