Which groundbreaking design methodology, introduced in the 1990s, revolutionized product development by emphasizing user research, rapid prototyping, and iterative testing?

In the history of product design, certain innovations fundamentally transformed how we interact with everyday items. This poll explores a significant invention that revolutionized product design methodology and influenced countless consumer products we use today. Test your knowledge about the pioneers who changed how products are conceived, designed, and marketed to consumers.

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Design Thinking (popularized by IDEO and Stanford d.school)
Six Sigma (developed by Motorola)
Agile Development (from the Agile Manifesto)
Total Quality Management (TQM)