Hi @Françoise,
Here is information from the JMP Help Page on the tool
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Sensitivity Indicator
Shows or hides a purple triangle whose height and direction correspond to the value of the partial derivative of the profile function at its current value. This is useful in large profiles to be able to quickly spot the sensitive cells.
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The partial derivative measures the rate of change of the response with respect to a given factor, holding other factors constant. The larger the triangle, the greater the response changes in relationship to a change in that factor.
Thanks,
Ben
“All models are wrong, but some are useful”