Material choice must be explained clearly
In material selection, if materials are chosen for trend or inventory alone, the material does the talking while the team can't say why.
Article Industrial Design Consumer & Retail
Interaction Begins with the Body
When product interaction design starts with interfaces and lighting, the way people actually use their hands and bodies often becomes an afterthought. A more reliable approach is to define the physical action first, then design the interface, and document that decision in an action specification.
Key points
- Physical interaction in product design needs to move beyond starting with interfaces and lighting.
- Leave the process unchanged, and the same problem will recur: how people use their hands and bodies gets considered too late.
- Change the starting point: define the physical action first, then design the interface.
- Record the decision in an action specification, with the industrial design lead accountable for it.
- From then on, assess it against one question: does the action still work without looking at the screen?
01Translating Physical Interaction into Practice
Documenting physical interaction does not mean it has made its way into the product. The first step is to define the physical action, then design the interface.
If translating the intent simply means streamlining an interface-and-lighting-first process, frontline teams will face the same problem: how people use their hands and bodies gets considered too late.
Define the physical action first, then design the interface. Until that happens, physical interaction remains trapped in an interface-and-lighting-first approach.
02Where Physical Interaction Loses Its Intent
Physical interaction most often loses its intent when work is divided into tasks. Each department takes away an easy commitment, without the corresponding responsibility to say no.
The visible output still starts with interfaces and lighting, while internally no one can explain why the way people use their hands and bodies has been left until later.
03The Smallest Usable Unit of Physical Interaction
The smallest usable unit of physical interaction is a decision someone can make on the spot. The action specification should make that possible.
Frontline teams should be able to apply physical interaction guidance without guessing what the brand team would think.
04Physical Interaction in the Hands of Frontline Teams
During an interaction review, examine one real use scenario and check whether the action specification has slipped back into an interface-and-lighting-first approach.
Revisions can be useful. The problem is when no one acknowledges that a revision has changed the physical interaction.
05Who Makes the Call on Physical Interaction?
Keep decision-making authority with the people applying the guidance. The industrial design lead owns it, and teams on the ground must be able to reject work that fails the action specification.
End training with one question: does the action still work without looking at the screen?
Framework
The Four Layers of Physical Interaction
From non-negotiable principles to tools people can use on the ground, each layer answers one question, keeping physical interaction from slipping back into an interface-and-lighting-first approach.
L1Action
This layer defines the non-negotiables of physical interaction.
L2Feedback
This layer turns physical interaction into criteria that can be checked.
L3What Must Work Without a Screen
This layer defines which aspects of physical interaction can change across contexts.
L4Validation
This layer puts physical interaction guidance in the hands of those who use it and sets out the exceptions.
Note: This diagram is a conceptual framework. It explains a way of thinking and is not statistical data. Source: Qingmei Future Insights.
Recommended actions
Action 01
Start from the site
Identify the moments in product interaction design when physical interaction guidance is actually needed. Start there, rather than revising the interface-and-lighting-first process.
Action 02
Keep it to one page
Replace lengthy explanations with an action specification. Keep only what supports defining the physical action before designing the interface.
Action 03
Judge it by one question
At the interaction review, ask one question: does the action still work without looking at the screen? Without an answer, the decision is not yet made.
Action 04
Name the owner
Assign ownership to the industrial design lead. Without someone to maintain it, physical interaction will be quietly altered when priorities clash.
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