In Google Drawings, the Insert menu is key to create a flowchart ... indicates a step that changes data, while a diamond represents a decision. A diagram shows a set of relationships among ...

If you are not familiar with Visio, it's used for creating diagrams such as flow charts ... Flowchart from Data template. Simply click on the template, then click the Create button to get started.

With a focus on how the business operates at a high level, logical data flow diagrams are a great starting point, providing the outline needed to create more detailed physical data flow diagrams.