Which innovative World War II product marketing strategy fundamentally changed how military equipment was designed, leading to the concept of 'user-centered design' in military products?

During World War II, product marketing played a crucial role not just for consumer goods, but for military equipment and supplies as well. Governments and companies needed to both innovate rapidly and effectively market their products to various stakeholders - from soldiers to civilians supporting the war effort. This poll explores one fascinating aspect of military product marketing that changed the trajectory of military equipment design for decades to come.

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The 'Sherman Tank Initiative' that gathered direct feedback from tank operators to redesign controls and interior layouts
The 'Bomber Command Survey' that measured pilot satisfaction with aircraft interfaces but was largely ignored until after the war
The 'Infantry Equipment Board' that standardized all equipment based on economic production metrics rather than soldier feedback
The 'Naval Combat Communications Program' that prioritized theoretical engineering principles over sailor experience in radio design