“With that big screen, I don’t know how people don’t get distracted.”
“What’s that screen doing sticking out there?”
“I would stress out if I was supposed to be aware of the screen and drive!!!”
I have heard many times people comment such things very often when talking about the Tesla Model 3 and its 15 “screen. This, is the connection point between the vehicle and the user, there is not a single button on the dashboard, that is the main reason for me to analyze how Tesla has done it to make life easier for the driver and passengers.
What methodology have I used to test usability?
I have based this analysis on the PURE (Pragmatic Usability Rating by Experts) method of Nielsen Norman Group, which focuses exclusively on showing the difficulty of the steps that users would take to complete the tasks. During the process I assigned quantitative ratings to the design proposed by Tesla, and then collected the total score that represented the data obtained.
I must say that it is not a substitute for usability tests, but it serves to identify problems.
How does the PURE method work?
The PURE method is an excellent technique that allows us to measure the usability of a digital product, and compare its evolution in each of its different versions.
A scale of 1 to 3 is established. The higher the score is, the more difficult to perform that task. A color code is established, green (1 point) for simple tasks, yellow (2 points) for a medium ·cognitive load·, which can be done with some effort, and red (3 points) for the task that creates confusion and sometimes it is not possible to carry it out.
The PURE score of the task is the sum of the grades obtained in each step. The final color will be determined by the worst grade obtained in any step of the task.
1. Identify the user
In countries like the United States, the custom of renting the vehicle itself to other people to get extra income, with services such as turo.com, is widespread. The user of this test will be a person who drives a Tesla vehicle for the first time after renting it. In most cases, users are usually techies, although there is also the case of people who are attracted to other characteristics of the vehicle and who are forced to update themselves quickly in the use of technology. But for this test we can assume that the person who is going to drive it does not have to be especially skilled in matters of interaction, simply wants to drive the vehicle.
I have assumed that a Tesla vehicle owner decides to increase his income by renting it to a stranger, for that, that person must change some basic driving settings such as mirrors and steering wheel height.
This user will also adjust the acceleration, since it can reach 100 km/h in 3.7 seconds it is advisable to set the driving mode “chill”, steering wheel hardness and regenerative brake and stop options.
It is also considered to want to customize the air conditioning and heated seats as well as playing music.
3. The happy path
I propose the logical steps that this typical user would choose to complete the three assigned tasks.
First of all, I want to apologize for the quality of the screens, I wish they had been better.
User must configure some basic driving settings such as mirrors and steering wheel height. Despite the existence of four different steps, the last one is very well resolved, providing a lot of visual information that is very useful for the user. That’s why I decided to give it a well-deserved extra point 😉