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SYSTEM ANALYSIS
LESSON 32 :
CONTEXT DIAGRAM
Topics Covered
• Context Diagram
Objectives
Upon completion of this Lesson, you should be able to:
• Discuss about context diagrams
Systems Analysis Context Diagram
Guidelines
Firstly, draw and name a single process box that represents the
entire system.
Next, identify and add the external entities that communicate
directly with the process box. Do this by considering origin and
destination of the resource flows and data flows.
Finally, add the resource flows and data flows to the diagram.
In drawing the context diagram you should only be concerned
with the most important information flows. These will be
concerned with issues such as: how orders are received and checked,
with providing good customer service and with the paying of
invoices. Remember that no business process diagram is the
definitive solution - there is no absolute right or wrong.
Systems Analysis– Level 1 Diagrams
There is no formula that can be applied in deciding what is, and
what is not, a level 1 process. Level 1 processes should describe
only the main functional areas of the system, and you should
avoid the temptation of including lower level processes on this
diagram. As a general rule no business process diagram should
contain more than 12 process boxes.#
The level 1 diagram shows the main functional areas of the system
under investigation. As with the context diagram, any system
under investigation should be represented by only one level 1
diagram.
The level 1 diagram is surrounded by the outline of a process box
that represents the b ...