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Video Title: HIPO Diagram
Description: HIPO Diagram
Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm
Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
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We are going to discuss HIPPO diagram.

The full form of HIPPO is hierarchical
input process output diagram.

So, hierarchical input process output
diagram is a combination of two organized

methods to analyze the system and provide
the means of documentation.

HIPPO model was developed by IBM in the
year 1970.

So, HIPPO diagram represents the hierarchy
of modules in the software system.

Analyst uses HIPPO
diagram in order to obtain

high level of view of
the system functions.

And it decomposes functions into sub
functions in a hierarchical manner.

And it depicts the functions performed by
the system.

Hierarchical means it will be having a
tree like diagram.

So, that will be one root and there will
be some branches are there and with the

leaf nodes and in between intermediate
nodes.

So, here you can see that this each and
every rectangle is denoting a module.

So, this module can perform a procedure
might be performing a task or might be

performing a process.

So, here you see we are having this online
sales.

So, this is a module and this module is
having authentication, inventory check,

payment process and dispatch Dispatch
items and this particular dispatch item,

this module is also having the generate
invoice and these are the respective

processes or
the tasks or the procedures to be performed

represented
in this hierarchy of module structure.

So, hippo diagrams are good for
documentation purpose.

Their graphical representations makes it
easier for the designers and the managers

to get the pictorial idea of the whole
system structure.

So, for this purpose, this hippo diagram
is actually there.

In contrast to input process output,
we are having another diagram known as

input process output diagram, IPO,
which depicts the flow of control and data

in a module.

In case of hippo diagram, there was
no scope to represent

how the data
is flowing, how the control is flowing.

So, that concept is not there.

So, hippo diagram
is only denoting the whole

system in a hierarchical
view module wise.

So, hippo does not provide any information
about the data flow or the control flow.

So, here we are having one input process
output.

So, input process output diagram.

So, here we are just denoting the
authentication.

Input will be obtained from the user
screen and these are the processes are

going to be carried
out and this is the output

which will
be obtained on to the user screens.

So, take authentication credentials from
the user screen, check the validity of

credentials and call appropriate module and
output will be obtained on the user screen.

So, both parts of hippo diagrams,
hierarchical representation and IPO chart

are used for
structure designing of software program

as well as
documentation of the software program.

So, in this particular session with proper
examples we have discussed what is one

hippo diagram and what are the merits
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