Modular Design

Modular design, or "modularity in design", is a design approach that subdivides a system into smaller parts called modules or skids, that can be independently created and then used in different systems.

Modularity

• 1. The idea behind modularity is the splitting up of the problem into a series of self-contained modules.

  2. In practice it is advised that a module should not exceed 100 or so lines and preferably be short enough to fit on a single page

Advantages of Modularity in Program Development

• • Improves Readability and Understandability

  • Improves Maintainability (Simplifies modifications, Facilitates Trouble-shooting)

  • Allows for Re-usability

    • Within the program

    • From program to program

  • Reduces Development time

  • Improves Reliability

  • Increase standardization of software development process

Top-Down approach

• • Break task down into smaller tasks or processes

  • Stop when a process will not break down further

  • Write functions for lowest level process