How many symbols are used in process charting in the preparation of charts?

In process charting, several standard symbols are commonly used, including ovals for the start and end points, rectangles for processes or actions, diamonds for decision points, and arrows to indicate the flow of the process. Additionally, parallel lines often represent storage or inventory, while dashed lines can indicate information flow. The specific symbols may vary slightly depending on the methodology being used, but these are the most fundamental ones.