Software Engineering - Topic 5

​Software Design & Engineering - Topic 5

Mark Lister V. Nalupa​

​Intended Learning Outcomes

• ​Explain the software design

• Identify the software design level

• Explain modularization, concurrency, cohesion, and coupling

• ​Explain the multiple variants of software design

  Differentiate the two approaches in software design 

 

​Software Design Levels

1. architectural design

2. high-level design

3. detailed design​

Advantage of Modularization

• ​Smaller components are easier to maintain

  Program can be divided based on functional aspects

  Desired level of abstraction can be brought in the program

  Components with high cohesion can be re-used again.

  Concurrent execution can be made possible

  Desired from security aspect

concurrency

Seven Types of Cohesion

• ​Co-incidental cohesion

• ​Logical cohesion

• ​Temporal cohesion

• ​Procedural cohesion

• ​Communicational cohesion

• ​Sequential cohesion

• ​Functional cohesion

Five Levels of Coupling

• content coupling

• common coupling

• control coupling

• stamp coupling

• data coupling​

design verification

structured design

function-oriented design

Variants of Software Design

• ​structured design

• ​function-oriented design

• ​object-oriented design

Software Design Approaches

• ​top-down approach

• ​bottom-up approach