The v/h journal / Document
Count the hands a task takes
One button can still take two hands.
Imagine a small utility that slides across the table when you press Start. Your other hand has to steady it. If that hand is already holding the object, even beginning the task becomes awkward.
For v/h, we want to count the physical adjustments an owner has to make. During setup, use and removal, we would record every moment someone has to brace the device, change their grip or ask for help.
We would try the sequence with either hand and with people who have different hand sizes and grip strength. The force needed to use a control belongs in the design, alongside its label and position.
An agent under the hood could handle repeated adjustments during the job. The controls and housing still have to work with the person using them.
Our first utility is in development. The document describes an imagined example and proposed checks, with the aim of making a new capability easier to use in an ordinary routine.
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Design for the part that wears out