Final answer:
In this scenario, Robert is using a priority system to make a rational decision
Step-by-step explanation:
In the given scenario, Robert is using a priority system or prioritization to make a rational and feasable decision about his new house. This involves assigning different levels of importance or priority to each characteristic on his list based on their relevance to his needs and preferences.
It can also be seen that Robert is using a rational decision-making process as well to prioritize the characteristics of his new house. By listing the items in order of importance to him, starting with the overall proximity to a bus stop as the highest priority, Robert is demonstrating a rational approach to decision-making.