A **multidisciplinary coupling graph** is a particular
N^{2} chart.
Its diagonal elements are the disciplines.
A discipline takes its inputs vertically
and returns its outputs horizontally.
The links between disciplines are located
outside the diagonal as coloured squares.
In other words,
if the cell (i,j) is colored,
the j^{th} discipline takes as input
some outputs of the i^{th} discipline;
we talk about *bi-disciplinary coupling*.
The disciplines that are strongly coupled to each other
are part of the same group, represented by a color
whose intensity increases with the number of coupling variables.

Click on a diagonal element to get details about the corresponding discipline or group of disciplines or on a non-diagonal element to get details about the bi-disciplinary coupling variables (the variable dimensions are in parenthesis). Right click on a diagonal element to expand or collapse the related group.

A group consists of disciplines
that are strongly *coupled ^{ (1)}* to each other
and weakly coupled to those in other groups,
except for the first one which contains the disciplines
that are only

*
^{(1)} A and B are strongly coupled
if A depends on B and B depends on A.
*

*
^{(2)} A and B are weakly coupled
if either A depends on B or B depends on A,
but not both.
*