Final answer:
Justin used the optimizing model in making his decision to hire staff for the rehabilitation unit.
Step-by-step explanation:
Justin used the optimizing model in making his decision to hire staff for the rehabilitation unit. The optimizing model focuses on finding the best possible solution based on careful evaluation and consideration of various factors. By reviewing each application thoroughly and interviewing candidates carefully, Justin aims to hire staff who can provide high-quality care and fit well with the team. This approach ensures that the chosen staff will be the most suitable for the job, leading to better care for the patients and a more harmonious work environment.