Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M9846

Execution Gap

Execution Gap
SystemsmediumSystems Theory
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Updated 2026-08-15

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INTRODUCTION

English translation pending.

CORE DEFINITION

The execution gap is a concept from Donald Norman's model of action, and it describes the distance between the user's intention and the operations the system makes available. If someone wants to record a film and the only control on the device is a timer, a gap has opened: the goal exists, but the path from goal to action is missing or buried. The core proposition is that such gaps are design failures rather than user failures, and that they are closed through perceivable affordances and clear mappings rather than through bigger manuals. The key qualification is that adding features without mapping deepens the gap, because each added option raises the search cost of the one needed.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- List Intentions: write what users actually want to accomplish, in their own words. - Match Controls: compare each intention with the operations the interface exposes. - Bridge With Mapping: make the control resemble the goal so the path is visible.

anchor

Anchor fast decisions

In Norman's seven-stage model, an intention must be translated into a plan of action and then into a physical movement on a control. Where the system's vocabulary does not contain an operation matching the plan, the translation fails and the user stalls, knowing exactly what they want while unable to do it. Affordances tell the user what is possible, and mapping tells them which control corresponds to which result; strengthening both removes the translation failures rather than training the user to tolerate them.

MINIMUM ACTION

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Source support: Explicit

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    en.wikipedia.orghttps://en.wikipedia.org/wiki/The_Design_of_Everyday_ThingsZH · Explicit
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