Ch 7 Keywords

what happens during the design and implementation phase?

• you make a plan

• executable software is developed (inter-leaved activities)

• create a context model to demonstrate the system

• create an interaction model

what is the design portion of the design and implementation phase?

• realizing the design as a program

• identify software components and their relationships based on requirements (how to solve the problem)

• creating models

what is the implementation portion of design and implementation phase?

• realizing the design as a program

• identify software components and their relationships based on requirements (how to solve the problem)

• creating models

what is a context model?

• structural model that demonstrates the other systems in the environment of the system that is being developed (associations=relationships)

• structural model that demonstrates interactions

• interaction model that demonstrates actions

what is the relationship between a use case diagram and context diagram?

• they show the scope of the project, but from different perspectives

• they both use actors/stick figures in the model

• they are both interaction models

what is a interaction model and what type of diagram falls under this category?

• structural model that demonstrates other systems

• dynamic model that shows how the system interacts with its environment as its used (use case diagram)

• structural model that shows associations/relationships through arrows with a process/bubble in the middle

whats a design model and what are examples?

• shows objects and object classes and relationships between them (structural and dynamic)

• its the implementation of the system

• it does not show relationships, just what each thing does

whats a structural model?

• describes a dynamic interaction between objects

• describes the static structure of the system in terms of object classes and relationships

whats a dynamic model?

• describes a dynamic interaction between objects

• describes the static structure of the system in terms of object classes and relationships

what is the observer pattern?

• describes the static structure of the system in terms of object classes and relationships

• defines one to many dependencies/relations between objects (when one object changes state, all dependencies are notified and updated automatically) (this pattern can be used where different presentations/forms of an object state are requirements)

• 
  describes a dynamic interaction between objects

• this pattern shows what the system does