Final answer:
Isoke was in the strategy phase of the planning process model, where she identified customer service issues and planned proactive solutions to enhance the fast food restaurant experience.
Step-by-step explanation:
Isoke was in the strategy stage of the problem-solving process, which involves identifying issues and preparing to address them proactively. In the scenario, the task was to address customer complaints and improve the service experience. Isoke focused on listening to the feedback from customers and then consulting with the team to find a solution. By implementing floor markings in response to the feedback, she devised a solution that made the paying process clearer and more efficient, ultimately achieving significant improvements in customer satisfaction and operational efficiency. As a result, the business experienced no complaints during high traffic times and enhanced customer service.