Definition
A Type III Error is the error of correctly solving the wrong problem. In modeling and simulation, it is the Model Accreditor’s Risk: using a valid model for an application it was not intended for.
- How to read: “Type three error.”
- Meaning: Finding the right answer to the wrong question.
Why It Matters
Type III errors are the most insidious because they involve a “correct” execution of the wrong strategy. A model may be perfectly verified and validated for one domain (e.g., flight dynamics) but totally inappropriate for another (e.g., fuel economy), leading to misplaced confidence and catastrophic misuse.
Core Concepts
- Wrong Problem Definition: Often caused by a failure in the initial requirements gathering or a lack of domain expertise.
- Misapplication: Using a specialized tool in a generalized context where its assumptions no longer hold.
- Model Accreditor’s Risk: The risk that the authority approving the model for use fails to see the mismatch between the model’s scope and the current problem’s requirements.