Iteration is one of the most important scoring factors in the IB Design Technology IA — and one of the easiest to misunderstand. Many students believe iteration means rebuilding the product multiple times or making dramatic changes. In reality, iteration is about learning from testing and improving the design logically.
IB examiners are not looking for endless versions. They are looking for evidence of thinking, reflection, and improvement.
What Does Iteration Mean in IB Design Technology?
Iteration means making informed changes to a design based on testing, feedback, or analysis.
In the IB Design Technology IA, iteration involves:
- Testing a design or prototype
- Identifying weaknesses or limitations
- Making changes to address those issues
- Explaining why the changes were made
If a design never changes, examiners assume the design process was shallow.
Why Iteration Is So Important for IA Marks
Iteration affects multiple assessment areas:
- Design development
- Testing
- Evaluation
- Evidence of design thinking
Projects with weak iteration often feel descriptive and linear. Projects with strong iteration show authentic problem-solving, which is exactly what IB wants to assess.
What Counts as Meaningful Iteration?
Changes Based on Testing
The strongest iteration comes from testing results.
For example:
- User feedback highlights discomfort
