Which design methodology, invented in the 1990s, revolutionized product development by emphasizing rapid prototyping, user testing, and iterative design before full-scale production?

Throughout history, product design has revolutionized how we interact with everyday items. Behind many of today's common products are fascinating stories of discovery, innovation, and sometimes happy accidents. This poll tests your knowledge about a groundbreaking design methodology that transformed the product development landscape and continues to influence modern invention processes across industries.

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