A plan of the factory showing the routing taken by people when they enter the factory, when they move around in the factory from one department to another, and when they leave the factory. It should also show how visitors will enter and where they will go. It can show how people will move from the office areas to the warehouse. People should be limited to those areas where they have their activities. Production areas should not be used as passages or corridors for non-essential personnel movement. This is particularly important in the case of purchasing and accounts department staff who will be handling invoices for goods delivered or shipped out. This plan shows how access control is maintained.