Tad made a nice list of Considerations for operations. What do you think is important to consider in designing a layout intended for operations? Here are a few maybe more "generic" ones to start with: How big is the room? How big do you want the layout to be? What industries do you like (and what fits your era)? How will you tie them together? What will they supply/consume? What industires will be "off layout" or implied? Will there be passengers? Will there be postal/RPO services? Will there be engine services?