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Separation of Concerns principle helps to create flexible, reusable and maintainable software systems. But it is an ongoing process throughout the design process.
Concern it is anything that matters in providing a solution to a problem. Some of the concerns in software may involve:
Example with SmartPhone, let’s say we have the next class:
Continue reading “Separation of Concerns”Coupling and cohesion are metrics to evaluate design complexity.
These metrics helps to achieve a more manageable system.
Coupling focuses on complexity between a module and other modules. If your module is highly reliant on other modules, then this module is tightly coupled to others (puzzle). If your module finds it easy to connect to other modules, this module is loosely coupled to others (Lego).
When evaluating the coupling of a module, you need to consider degree, ease and flexibility.
Continue reading “Coupling and Cohesion”
This example has the next 4 entities:
All of the connections are composition. The system has the next generalization connections:
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