Business flow chart (TFD) Is a description of the units within the management system , Business relationship between people , Chart of job sequence and management information flow , It is an intuitive display of relevant business processes .
 It uses some prescribed symbols and lines to represent the processing process of a specific business , Help analysts find out the unreasonable flow direction in the business process .
 Business process diagram is one of the most common charts , Being able to read is a required course , Drawing is a very important elective course .  In real life , We come across all kinds of processes .
 Business flow chart   Business process model business process model (Business Process Model,BPM) Business requirements as the starting point , Describe the task and business process of the system in a graphic way , Focus on the data flow in the process .