Designing for Humans: Viewing DFM and Industrialization Through the Lens of the Fitts MABA–MABA List

Manufacturing yield problems are often blamed on operator error or inadequate training, but many stem from design decisions that assume machine-like human performance. Applying the Fitts MABA-MABA ('Men Are Better At / Machines Are Better At') framework during DFM and industrialization helps identify latent failure modes rooted in human limitations. Practical examples include blind-mate connectors that rely on proprioceptive feedback that degrades with fatigue, and low-contrast inspection points that exceed human visual discrimination ability. The recommended approach shifts correctness from human memory and vigilance into physical geometry, tooling, and poka-yoke design — making incorrect assembly states difficult or impossible. This perspective integrates naturally into design reviews, FMEAs, pilot builds, and automation decisions, and extends beyond manufacturing to service, calibration, and field installation workflows.