Why Usability Has Shaped Car Cockpits for 100,000 Years – From Stone Tools to iDrive

1. Usability: A Simple and Timeless Proposition

The notion of “usability” can be traced back to the stone‑age, when early humans selected tools that fit comfortably in the hand and cut efficiently, embodying the earliest ergonomics. Although humanity has long practiced usability, modern usability engineering as a discipline is relatively recent.

Early 20th‑century ergonomics and human‑factor studies laid the academic foundation for usability. The explosion of computing in the 1980s brought complex interactive systems, prompting the rise of usability engineering to standardise design goals, experience metrics, and iterative validation.

Key research from the late 20th century includes Nielsen and Landauer’s 1993 curve showing that testing 4‑5 users uncovers about 80% of usability problems, and the System Usability Scale (SUS) introduced by Brooke in 1996. Usability was later defined by three dimensions: effectiveness, efficiency, and satisfaction.

2. Cockpit Interaction Development and Usability Engineering

Apple’s 1983 Lisa introduced graphical desktop interaction, influencing modern usability guidelines. In automotive, the first car‑mounted navigation system, the Gyro‑Cator (1981), demonstrated early attempts at complex in‑vehicle interfaces, though it remained cumbersome.

Luxury cars added more physical controls, leading to dense button layouts that required ISO standards for knob and switch ergonomics. BMW’s first iDrive system (2001) attempted to consolidate functions into a single rotary knob and screen, but the 700‑plus menu items, deep hierarchies, and eight‑directional knob caused user frustration and negative press.

BMW later built a dedicated usability lab with driving simulators, eye‑tracking, and high‑fidelity prototypes to refine iDrive, adding shortcuts, redesigning menu logic, and integrating handwriting input. Over the 2000s, iDrive became a benchmark for cockpit interaction.

3. In‑Vehicle Interaction in Autonomous Driving Environments

As autonomous driving (SAE L1‑L3) advances, in‑vehicle interfaces must convey the current driving mode and user responsibilities. Distractions remain a major safety concern; NHTSA data shows 17% of crashes involve driver distraction, prompting guidelines that limit visual off‑road time to two seconds.

Beyond functional safety (ISO 26262), the emerging SOTIF (Safety of the Intended Functionality, ISO PAS 21448) addresses non‑fault‑related risks such as design‑induced errors and human misuse. Human‑machine interaction is identified as a critical factor for safe autonomous operation, requiring rigorous usability verification.

4. Outlook for the Future

The automotive industry faces a new singularity: widespread advanced driver‑assistance, full autonomy, pervasive connectivity, and AI‑driven multimodal interaction. These trends demand continuous evolution of usability engineering, expanding its scope to measure user experience in ever‑more complex, data‑driven vehicle systems.

Usability engineers will remain essential partners to designers and engineers, ensuring that emerging technologies are safe, intuitive, and human‑centred.

References

Usability Engineering, Jakob Nielsen, 1993

ISO 9241‑11 (2006) Ergonomics of Human‑System Interaction

Visual‑Manual NHTSA Driver Distraction Guidelines for In‑Vehicle Electronic Devices

A Brief History of Usability, Jeff Sauro, 2013

2002 BMW 745i, Geog Kacher, 2001

Sundae for First‑Class Passengers, Artemy Lebedev, 2002

20 Years of the BMW iDrive: The Story, BMW GROUP, 2021

Why You Only Need to Test with 5 Users, Jakob Nielsen, 2000

Various white‑papers on autonomous‑driving safety and SOTIF (2019‑2020)