Final answer:
Implementation, the fourth step of the nursing process, begins after the care plan has been developed. Although emergencies may require immediate action, the structured process follows planning and goal setting.
Step-by-step explanation:
Implementation as the fourth step of the nursing process begins after the care plan has been developed. This step involves enacting the nursing interventions that were designed during the planning phase to meet the goals set for patient care. While assessment is crucial, it precedes planning and does not involve intervention. In critical situations, immediate action may be required; however, in the structured nursing process, implementation follows the creation of a care plan. Mutual goal setting between a nurse and patient is also key to successful outcomes but is part of the planning phase that informs the interventions.