Rules of Flowchart

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Flowchart Rules
While programmers have a good deal of freedom in creating flowcharts, There are a number of general rules and guidelines, recommended by the American National Standards Institute (ANSI), to help standardize the flowcharting process. Various computer manufactures and data processing departments usually have similar flowcharting standards. Some of these rules and guidelines are 
as follow:
  1. First chart the main line of logic, then incorporate detail.
  2. Maintain a consistent level of detail for a given flowchart. 
  3. Do not chart every detail otherwise, the flowchart will only be a graphic representation, step by step, of the program. A reader, who is interested in greater detail can refer to the program itself.
  4. Words in the flowchart symbols should be common statements, which are easy to understand. It is recommended to use descriptive titles written in designer's own language, rather than in machine-oriented language.
  5. Be consistent in using names and variables in the flowchart.
  6. Go from left to right, and top to bottom in constructing flowcharts.
  7. Keep the flowchart as simple as possible. The crossing of flow lines should be avoided, as far as practicable. 
  8. If a new flowcharting page is needed, It is recommended that the flowchart is broken at an input or output point. Moreover, properly labelled connectors should be used to link the portions of the flowchart on different pages.

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