The HIPO diagram is a modeling technique developed by IBM in 1970 that combines a hierarchy chart with IPO (Input-Process-Output) charts. The hierarchy chart graphically represents a program's control structure, while the IPO charts describe the inputs, processes, and outputs of each module. HIPO diagrams are useful for both designing and documenting software structure, as their graphical nature makes the system design easier to understand for managers and designers. However, HIPO diagrams do not provide information about data or control flow within a module.

1. HIPO Diagram
Hierarchical Input Process Output
LAIBA NOOR

2. Jens
Martensson
DEVELOPMENT
HIPO model was developed by IBM in
year 1970.
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3. Jens
Martensson
DEFINATION:
Hierarchical Input Process Output
HIPO diagram is a combination of two
organized method to analyze the
system and provide the means of
documentation.
PURPOSE:
A HIPO model consists of a hierarchy
chart that graphically represents the
program’s control structure and a set
of IPO (Input-Process-Output) charts
that describe the inputs to, the outputs
from, and the functions (or processes)
performed by each module on the
hierarchy chart.
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4. Jens
Martensson
EXAMPLE:
HIPO diagrams are
good for
documentation
purpose. Their
graphical
representation makes
it easier for designers
and managers to get
the pictorial idea of the
system structure.
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5. Jens
Martensson
IPO:
In contrast to IPO
(Input Process
Output) diagram,
which depicts the
flow of control and
data in a module,
HIPO does not
provide any
information about
data flow or control
flow.
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Both parts of HIPO diagram, Hierarchical presentation and IPO Chart are used for
structure design of software program as well as documentation of the same.

6. Thank
You
LAIBA NOOR
l.noor88888@gmail.com