Good design is thorough to the last detail—Rams' eighth principle

Dieter Rams's 8th of the "Ten Principles of Good Design" states: "Good design is thorough down to the last detail (Gutes Design ist konsequent bis ins letzte Detail)." Vitsœ's official text continues:
"Nothing should be arbitrary or left to chance. Care and accuracy in the design process show respect towards the user."
Herein lies the core of the 8th principle. Attention to detail is not aesthetic perfectionism, but an ethical attitude towards the user.

ET66 Calculator – Design Philosophy Revealed in Detail

The 1987 Braun ET66 calculator is a textbook example of the 8th principle. Co-designed by Dietrich Lubs and Rams, this calculator is part of the V&A (London) permanent collection.
While all buttons are uniformly monochrome in black and gray, only the "=" button is highlighted in yellow, power in green, and clear in red. The buttons are slightly convex, allowing their position to be identified by touch. The Helvetica font's neutrality is leveraged, and numbers, arithmetic operations, and memory functions are distinguished by color and hierarchical arrangement.
"Nothing left to chance" – every element of this calculator has a reason behind it. The fact that Apple's iOS calculator app referenced this color scheme for many years is because such detailed design philosophies function across time.

Respect Resides in Unseen Parts

Steve Jobs is sometimes said to have learned the attitude of "making even the unseen back beautiful" from his father. When building a fence, his father told him to "make the back as beautiful as the front." When Jobs asked, "Nobody will see it," his father replied, "You will know." Even with the NeXT computer, Jobs applied expensive plating to internal screws that only repair technicians would see, and painted the inside of the case.
This is a spirit on the same plane as Rams's 8th principle. However, there is also a critical difference between Jobs and Rams – Jobs continued to release minorly updated iPhones every year. He simultaneously practiced "thoroughness down to the last detail" and "planned obsolescence." The contradiction with Rams's 7th principle, "long-lasting," indicates the point where Jobs and Rams diverged.

Resonance with Japanese "Monozukuri"

Rams was strongly influenced by Japanese architecture. He stated, "Traditional Japanese architecture, where floors, walls, and ceilings are clearly and precisely constructed, and materials and structures are carefully combined, is far more sophisticated than European extravagance or ostentatious formalism."
The Japanese artisan ethic – not cutting corners even in unseen parts – and Rams's "nothing left to chance" arrive at the same point from different cultural contexts. However, while Japanese wabi-sabi considers "perfection within imperfection" as beauty, Rams's 8th principle differs in its direction by thoroughly pursuing logical consistency (konsequent).

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