Final answer:
The structured programming approach is used in cleanroom software engineering to refine data design and function design.
Step-by-step explanation:
In cleanroom software engineering, the structured programming approach is used to refine both data design and function design.
The structured programming approach uses a logical, systematic approach to solve problems through analysis and evaluation of alternate solutions.
By refining data design and function design, the structured programming approach helps to improve the quality and effectiveness of the software being developed.