Coupling:
The
primary difference between transaction analysis and transform analysis is that
transaction analysis recognizes that modules can be organized around the
transaction center rather than a transform center. Coupling:
Types of
coupling: (from best to worst)
·
Data
coupling — two modules are said to be
data coupled if their dependency is based on the fact that they communicate by passing of data.
·
Stamp
coupling — two modules are said to be
stamp coupled if their communication of data is in the form of an entire data structure or record.
·
coupling — two modules are said to be control
coupled if their dependency is based on the
fact that they communicate by passing of control information or flags.
·
Common
coupling — modules are said to be
common coupled if they refer to the same global data area.
·
Content
coupling — two modules are said to be
content coupled (also referred to as
hybrid coupled) when one module actually modifies the procedural contents
of another module.
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