Step 1. Identify all design classes that correspond to the problem domain. Step 2. Identify all design classes that correspond to the infrastructure domain. Step 3. Elaborate all design classes that are not acquired as reusable components. Elaboration requires that all interfaces, attributes, and operations necessary to implement the class be described in detail. Design…
Component-level design occurs after the first iteration of architectural design has been completed. At this stage, the overall data and program structure of the software has been established. A component is defined in UML as: “a modular, deployable, and replaceable part of a system that encapsulates implementation and exposes a set of interfaces.” However, different…
In building, there are styles known to architects. If you speak of a style, they know what you mean. An architectural pattern, like an architectural style, imposes a transformation on the design of an architecture. However, a pattern differs from a style in a number of fundamental ways: (1) the scope of a pattern is…
Software Architecture is the structure, or structures, of the system that comprise of software components, the externally visible properties of the components, and the relationships among them. Architecture is not operational software, rather it is representative to allow you to see how effective your design is and consider alternatives. It focuses on components. It may…
An MVP, or Minimally Viable Product, is a common process in the modern software world. It got famous as part of the Lean Startup model, and has grown in popularity. Let’s look at some reasons why. When looking at the design and model of your project, you may think you have a winner. But do…
This is the last step between modeling our problems and coding our solutions. Each of the elements in our requirements model helps provide us with necessary information that can be used to solve our problem. While the book has the models and design being two separate steps, in many cases you will find that they…
Software patterns are a mechanism for capturing domain knowledge in a way that allows it to be reapplied when a new problem is encountered. In some cases, that knowledge is applied to a new problem within the same domain. In other cases, the domain knowledge captured by a pattern can be applied by analogy to…
The state of the class takes on both active and passive qualities. A passive state is simply the current status of an objects attributes. For example: Consider a GPS app. Your position, direction, etc are just attributes of your class, and thus the passive state. An active state is the status of an object that…
