In the utility report, 1-2 level has an average utility of -14, 3-4 is 6, 5-6 is 0, 7-8 is 6 and >8 is 2. So I interpret the result as respondents prefer a 3-4 throughput to a 5-6 throughput.

However in the sensitivity analysis, when I simulate the SOP, holding everything else equal, the SOP associated with 5-6 (21%) is somehow higher than the SOP with 3-4 (17%).

I'm confused here. Which level is the optimal configuration then? 3-4 or 5-6?