Structured Design is made up of:
- System organization. Systems are organized into "Black
Boxes", routines that have well-defined, narrow
interfaces and whose implementation details are hidden
from other routines.
- Strategies for developing design.
- Criteria for evaluating design.
- A clear statement for the problem to guide the solution
to the problem.
- Graphical and verbal tools for expressing designs,
including structure charts and PDL.
There are TWO approaches for Structured Design:
- Top-down Approach
- Bottom-up Approach
- Design the top level first
- Choose the implement language, which one is suitable to
- Postpone working out the details to the lower levels of
- Formalize and verify each level.
- Move to next lower level to make the next set of
- Make sure what is the system needs to do.
- Identify low-level capabilities from that question.
- Identify with the next level up, or go to the top level
and try to do Top-Down.
Examples of Bad and Good Programs
- Here are examples of bad and good routines.
Department of Computer Science, University of Regina.
[CS Dept Home Page]