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  Various OO Design Approaches

Various OO Design Approaches

1. Booch Method

In the Booch method macro development  process encompasses planning activity that  clusters similar objects in separate partitions , layers objects by levels of abstraction,  create a design  prototype and validates this by applying  it to usage scenarios. In the  micro development  process, domain specific policies for memory management error handling  and other infrastructure functions are defined.

2. Rumbaugh Method

According to this method design is to be conducted at two  different levels of abstraction.

They are:

System Design: System design  focuses on layout for components  that are needed to construct a complete product or system

Objects Design : Objects design  emphasized detailed layout of an individual  objects.

3. Jacobson  Methods

The Jacobson methods tells that first  primary design objects called  blocks  are created then they are categorized according t their  working areas. Communications between these blocks during execution are defined and these blocks are organised into subsystems.

4. Coad and Yourdon Method

This methods addresses  the application as well as the infrastructure  for the application.

All OOD approaches differ in the way  design is approached. Each  approach  uses a distinct terminology and process step. By taking  a look at these approaches we can say  that OOD consists  of the  following basic steps:

  • Describe each subsystem and allocate it to processors and tasks.
  • Choose a design strategy for implementing data management interface support task management.
  • Design is an appropriate control mechanism for the system which :
  • Perform objects design.
  • Perform message design using collaborations between objects and objects relationships ,
  • Create messaging model , an d

Review design model and iterate as required.

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