Back in the old dnd days, they had rule for city/kingdom building - Resources, effort labor and the like. Building a dock required x amount of stone and labor. Crunchy number stuff that I wanted to figure out. So, if you wanted to build something, there is time involved. It is mostly going to come out in my posts of trying to manage the development of the city while things happen to work towards and against it.  (That is for me....) 


[@Mae] The simplest explanation would be taking the village to a town then maybe a city..