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Benefits of Good System Design

Benefits of Good System Design

Better understanding by the developer of the system. A properly designed system helps in
elaborating and understanding refined aspects of system.
System development becomes efficient. An error free designed system saves development time
since it helps in understanding without discussion.
A well designed system also helps in early detection of problems in critical areas, if any.
Better quality of reporting formats. Modifications can be made easily in the system.
Little maintenance is required in the operations phase.

23.1 System Analysis & Design Methods
Two approaches are followed for system analysis and design
Structured analysis and design – Which includes various tools, such as.
Data Flow diagram
Object oriented analysis and design

23.2 Structured Analysis and Design
Structured analysis and design follows a set of good practices and generally accepted standards. Proper
documentation of the system is made by following standard rules.

23.3 Flow Chart
"A schematic representation of a sequence of operations as in a manufacturing process or computer

Flowchart is the most commonly used design and analysis technique. The diagrammatic presentation gives a
quick understanding of the business processes and flows.

Although there are many symbols used proposed by various standards, but we would discuss some of the
most commonly used symbols. Understanding symbols representing functions, flows, etc may be more
readily understood by those who have some knowledge of the symbols. From a technical or point
of view, we have to know what symbols are used for various functions, etc.

Only one flow line is used in
conjunction with terminator symbol.

The usual direction of the flow of a
procedure or system is from left to
right or top to bottom.
Ensure that the flowchart has a
logical start and finish.

Only one flow line should enter a decision
symbol, but two or three flow lines, one for
each possible answer, should leave the
decision symbol

Only one flow line should come out
from a process symbol.
<0 >0
=0 <0 >0

Input / Output
Used whenever data is into the flowchart or
displayed from the flowchart. A single flow
line enters and a single line exits.

Off-Page Connector
Use to connect remote flowchart portion on
different pages. One flow line enters or

Single Document
Predefined Process
This represents a named process
consisting of one or more operations
or program steps specified elsewhere

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 communication.

Good Practices
Like every other methodology, flow charts also have a set of recommended practices for flow charts:
In drawing a proper flowchart, all necessary steps that are a part of process 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 flowchart.
It is useful to test the validity of the flowchart.

Input / Output
• Used whenever data is entered
into the flowchart or displayed
from the flowchart.
• A single flow line enters and a
single line exits.

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