The physical location of people and facilities can affect processing time and cause communication problems. If we move the physical location of adjacent steps in a process close together, work can be directly passed from one step to the next. This eliminates the need for communication systems (such as mail) and physical transports (such as vehicles, pipelines, and conveyor belts). The result of moving steps closer together can be lower capital and maintenance costs, reduced inventory (especially work in process), and more frequent improvement (from better communication). If it is not possible to physically move steps in a process together, electronic hookups should be considered. For some processes, computer networks with common file structures can have a similar effect as physically moving the steps together.