Flow Chart Design - How to design a good flowchart
FLOW CHART INTRODUCTION
The flow chart is a means to visually present the flow of data through
an information processing systems, the operations performed within the
system and the sequence in which they are performed. In this lesson, we
shall concern ourselves with the program flow chart, which describes what
operations (and in what sequence) are required to solve a given problem. The
program flow chart can be likened to the blueprint of a building. As we know
a designer draws a blueprint before starting construction on a building.
Similarly, a programmer prefers to draw a flow chart prior to writing a
computer program. As in the case of the drawing of a blueprint, the
flow chart is drawn according to defined rules and using standard flowchart
symbols prescribed by the American National Standard Institute, Inc. See
detail Flow Chart Definition.
FLOW CHART OBJECTIVES
At the end of this lesson, you will be able to understand:
- the meaning of flow chart
- the basic parts of the flow chart such as flow chart symbols and the
flow lines connecting these symbols.
- the advantages and limitations of flowchart
FLOW CHART SOFTWARE
Edraw Flow chart Software will help the designer create
professional basic flow chart, business process modeling notation chart, cross
functional flow chart, data flow diagram, list and workflow chart from examples - with no
Software and View All Examples
MEANING OF A FLOW CHART
A flow Chart is a diagrammatic representation that illustrates the
sequence of operations to be performed to gain the solution of a problem.
Flow charts are generally drawn in the early stages of formulating computer
solutions. Flowcharts facilitate communication between programmers and
business people. These flowcharts play a vital role in the programming of a
problem and are quite helpful in understanding the logic of complicated and
lengthy problems. Once the flowchart is drawn, it becomes easy to write the
program in any high level language. Often we see how flowcharts are helpful
in explaining the program to others. Hence, it is correct to say that a
flowchart is a must for the better documentation of a complex program.
A simple flow chart example
GUIDELINES FOR DRAWING A FLOW CHART
Flow Charts are usually drawn using some standard symbols; however, some
special symbols can also be developed when required. Some standard
flow chart symbols,
which are frequently required for flowcharting many computer programs are
shown in Fig.1
Flowchart Software and View All
FLOW CHART DESIGN SYMBOL
It is not strictly
necessary to use boxes, circles, diamonds or other such symbols to construct
a flow chart, but these do help to describe the types of events in the chart
more clearly. Described below are a set of standard symbols which are
applicable to most situations without being overly complex.
Rounded box - use it to represent an event which occurs automatically.
Such an event will trigger a subsequent action, for example 'receive
telephone call', or describe a new state of affairs.
Rectangle or box - use it to represent an event which is controlled
within the process. Typically this will be a step or action which is
taken. In most flowcharts this will be the most frequently used symbol.
Diamond - use it to represent a decision point in the process.
Typically, the statement in the symbol will require a 'yes' or 'no'
response and branch to different parts of the flowchart accordingly.
Circle - use it to represent a point at which the flowchart connects
with another process. The name or reference for the other process should
appear within the symbol.
FLOW CHARTING DESIGN GUIDELINES
The following are some guidelines in flow charting:
- In drawing a proper flow chart, all necessary requirements should be
listed out in logical order.
- The flowchart should be clear, neat and easy to follow. There should
not be any room for ambiguity in understanding the flow chart.
- The usual direction of the flow of a procedure or system is from
left to right or top to bottom.
- Only one flow line should come out from a process symbol.
- Only one flow line should enter a decision symbol, but two or three
flow lines, one for each possible answer, should leave the decision
- Only one flow line is used in conjunction with terminal symbol.
- Write within standard flow chart symbols briefly. As necessary, you can use the
annotation symbol to describe data or computational steps more clearly.
- If the flowchart becomes complex, it is better to use connector
symbols to reduce the number of flow lines. Avoid the intersection of
flow lines if you want to make it more effective and better way of
- Ensure that the flowchart has a logical start and
- It is useful to test the validity of the flowchart by passing
through it with a simple test data.
How to draw flowchart
Improving the layout of a
Create a complex
How to print a large
Should be Considered in Drawing a Flowchart
3 Easy Steps to Create
a Good Flowchart
Main Points in
Flow Chart Examples