Contents > 4 The SDMetrics User Interface > 4.9 The View 'Design Comparison'
4.9 The View 'Design Comparison'
The design comparison view allows you to compare the structural
properties of two UML designs. This is useful in a number of
situations.
Comparing subsequent versions of a design. Object-oriented
systems are usually developed in an incremental, iterative
fashion. After a design phase at the beginning of an iteration, you
can compare the current design to the previous iteration:
- Size metrics deltas quantify the growth in size of the
design. This serves as an input to the planning of the implementation
and testing efforts for the remainder of the iteration.
- Identify parts of the system design that have undergone much
change. Schedule these parts for review to ensure they are still in
line with the original vision for the architecture, and if not,
whether the deviation is justified.
Comparing design alternatives. If you have modeled
alternative solutions to a design problem, the structural properties
of the candidate designs can help support the decision which of the
alternatives to choose for implementation.
4.9.1 Calculating and Viewing Metric Deltas
4.9.2 Metric Deltas Table
4.9.3 Comparative Descriptive Statistics Table
4.9.4 Mapping Design Elements
4.9.5 Exporting Metric Deltas
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| Section 4.8 "The View 'Descriptive Statistics'" | Contents | Section 4.9.1 "Calculating and Viewing Metric Deltas" |