Final answer:
The planned change model refers to the process of implementing change in organizations or communities. The step in question is the one where the social work principle of 'professional use of self' is applied.
Step-by-step explanation:
The planned change model refers to the process of implementing change in organizations or communities. The step in question is the one where the social work principle of 'professional use of self' is applied. This principle emphasizes the importance of the social worker's self-awareness, professional boundaries, and ethical decision-making in order to effectively help clients or communities. During this step, social workers use their knowledge, skills, and personal qualities to engage with individuals or groups, understand their needs, and facilitate positive change.