Patient Discharge Practice

What are your practices related to patient discharge? Specifically, do you specify how quick the patient has to be out the door after the discharge order is written (patient must be discharged within three hours of written physician order, for example). Do you consider the patient discharged at the time the physician writes the discharge order, or when the patient is physically out the door? If there is a delay in transportation, do you provide care including meals/meds/glucose monitoring until the patient leaves the facility?
Any input/sharing of your practices would be appreciated. Thank you!!