It can be obvious if it’s designed right!

“Poka Yoke is a lean manufacturing tool that refers to ‘mistake-proofing’ or ‘error-proofing’ a process.”

It was originally created by Shigeo Shingo in the 1960s and implemented at Toyota as part of the Toyota Production System (TPS). [1] Its main objective is to prevent incorrect parts from being made or assembled, and can easily identify any flaw or error involved in the process.

  1. Child resistant caps: To make it difficult for children to consume a specific content.
  2. Cutters (Cutting tool): With a retractable blade that only pops out when the handle is pressed down.
Figure 2. Norman Door Example

“Why do you have to have a sign that says push or pull?… why not make it obvious?!“— Donald Norman

I considered this video one of my favorites to understand the user’s behavior in order to come up with creative and simple solutions. As the design guru explains, there are some basic design principles for a human-centered design: discoverability and feedback. These elements form the basis of how engineers and designers work today.

Figure 1. Video: It’s not you. Bad doors are everywhere.

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