Requirements skills and cells of the Outpost (State of Decay 2)

The game is not entirely clear to me terms of gameplay. when you want to hold any Outpost on the map sometimes writes (cells 0 requirements not met)although the impact abound,as these same cells to activate how??Now another workshop in the manufacture of any gun or other improvements,or additions ,writes ,there is no engineering skill or pathological anatomist well, other stuff,switched characters that were in the database ,not in any!How to be here?And yet ,finding books skills trying to read any Persian does not always work,ie not all read, some say excuses,as to be here?