What characteristic defines the flow of items in a straight line through flow system?

The characteristic that defines the flow of items in a straight line through a flow system is the one-directional movement of goods. This concept emphasizes that items progress straight through a defined path without diverting back to previous stages. In a well-structured flow system, such as in manufacturing or logistics, a one-directional flow helps to minimize handling, reduce confusion, and enhance efficiency. This streamlined process ensures that items are consistently moved from one stage to the next toward their final destination, whether that is a production point, a shipping dock, or a storage area.

In contrast, features like backtracking of goods imply a less efficient flow, often creating unnecessary delays and possible errors in inventory management. Similarly, multiple crossover points can complicate the flow, making it less straightforward and potentially leading to increased transit times. A combination of receiving and dispatching areas is more about the layout of operations rather than the characteristic of the flow itself, which focuses on the directionality and efficiency of item movement.