Generally, one diagram should not have more than 15-20 entities. If there are more entities required, consider refining the business area or logical data view. Include a legend on the diagrams. Avoid crossing lines if at all possible. Minimize the use of angled lines known as dog-legs.
Straight lines are preferred.
Function Hierarchy Diagrammer Identify Automated Functions a. Change the color of all automated functions for clarity and ease when referring back to the diagram. Unless you use a colored printer, this will show up with a gray background. Create a new hierarchy diagram, which will include only the automated functions. After system implementation, a request should be made to Data Administration to create a new version of the application. This must be done prior to any changes being made to the existing models.