ICE score
The ICE score is a prioritization strategy used for the selection of the most appropriate features for a product by taking the product of three factors - Impact, Confidence and Ease.
This template displays the ICE score as the product of the fields representing those three metrics in your instance.
If one of the fields does not have a value, 0 will be displayed.
For each of the parameters Impact, Confidence and Ease, select the field that represents that metric in your instance.
Configuration
To use the ICE Score template, simply select it from the template grid. Filter by KPI to find it faster.
Parameters
To complete the configuration, select values for all parameters.

Expert mode
If you switch to Expert mode you can see the Smart field in the Expression Parser. You can now tweak the expression to create a custom smart field based on this template.
Expression
Jira expression:
(issue?.customfield_IIIII || 0) * (issue?.customfield_CCCCC || 0) * (issue?.customfield_EEEEE || 0)
Replace the IDs with the ones of your number custom fields Impact (IIIII), Confidence (CCCCC) and Ease (EEEEE).
Format
Default