The second form is accessibility and workspace as seen by engineers working on board the ship. Ge et al. (0000) place a physical diesel engine in a virtual engine room and have operators change the starter motor; visibility, accessibility, workspace, and repair time are scored. Compared to the real environment, the error rate was 0.00% in qualitative indicators and 0.00% in repair time; without the environment, it was 00.00% and 0.00%. So neighboring equipment is important, but the method evaluates a given layout, not seeking a better one.