Operation is the planning, organization, implementation and control of the operation process, and it is the general name of all kinds of management work closely related to product production and service creation. From another perspective, operation management can also refer to the management of designing, operating, evaluating and improving the system that produces and provides the company's main products and services. The process flow chart graphically shows each task block of the whole process. For example, the process of customer order can be: from placing an order, through order entry, order processing, order completion and final delivery. If customers can place orders through multiple channels, such as telephone, order or Internet, the above process can be charted to determine which method is the most effective. Each step in a process is usually represented by a box with an arrow pointing to the next step. Other symbols are used to indicate start, end, input, output and other process steps. You can also use software programs to help you make flowcharts. We will explain the relevant contents in detail later in this article.