MENTAL MODEL · M6670

Identify, Design, Optimize, Validate

CreatemediumDesign Thinking

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Updated 2026-08-10

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INTRODUCTION

English translation pending.

CORE DEFINITION

IDOV, standing for Identify, Design, Optimize, and Validate, is one of the methodologies used in Design for Six Sigma. Identify determines customer requirements and the critical-to-quality characteristics derived from them. Design develops the concept and the detailed design. Optimize uses tools such as design of experiments to tune design parameters against the requirements. Validate confirms that the design meets customer requirements under realistic conditions. The methodology's premise is that quality must be built into the design, since defects introduced at that stage are far more expensive to remove later. It applies to new products, whereas DMAIC applies to existing processes.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Use requirement capture: translate customer needs into critical-to-quality characteristics before designing anything. - Use parameter experiment: test design variables systematically across their expected range rather than by intuition. - Use validation gate: verify the finished design against customer requirements with physical tests rather than simulation alone.

anchor

Anchor fast decisions

In a new design, most downstream defects trace back to decisions made before any testing occurs, so correcting them later means redesigning rather than adjusting. Front-loading requirement capture prevents optimizing a design against the wrong specification. Systematic parameter experimentation finds settings that satisfy the requirements across the expected range of conditions instead of at a single point. Validation then tests the finished design against those requirements, which is the step that catches assumptions made earlier in the absence of data.

MINIMUM ACTION

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Practice this model in one real situation:

Gather customer requirements and derive critical-to-quality characteristics. 2. Develop the design concept and the detailed design. 3. Use design of experiments to optimize the key parameters. 4. Validate the design against requirements with physical testing. 5. Hand the validated design to production with its control settings documented.

Check to track your progress (stored locally)

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Source support: Explicit

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