Decision Explainer for Expression Sets

Decision Explainer is a service that provides insight into why a business rule generated a specific result. For example, a student wants to know why they received a lesser discount on their course fee than what they expected. With Decision Explainer, the student application reviewer can check the application's history and the expression set that's used to evaluate the application, and provide the student the reason for receiving a lesser discount.

• Create Expression Set Message Tokens
  Expression set message tokens serve as placeholders for specific values from an expression set version within an explainability message template. Without tokens, the explanation messages would be static and unable to reflect the specific data involved in a particular execution of the rule. Create a token, and then map it to actual resources to dynamically display relevant data in explanation messages.
• Create an Explainability Message Template
  Explainability message templates store explanation messages, and can be referenced in an expression set version step to explain the step’s result. You can use expression set message tokens in your message templates as placeholders for expression set version resources. Rule designers can then map the tokens to the resources from the expression set version where the template is used. When the expression set runs, the explanations dynamically show the values of the mapped resources.
• Show Rule Explanations to Users
  When Decision Explainer is available in your Salesforce org, you can show your users the explanations for expression set version step results. The explanations are stored in explainability message templates that your admin creates and maintains.
• Disable Decision Explanations for Expression Set Version Steps
  To remove the explainability message templates assigned to an expression set version step, open the version in Expression Set Builder and deselect Show decision explanation for the step. You can disable decision explanations for expression set version steps only if the version is inactive.
• Show Rule Explanations to Users (Example)
  This example shows how you can configure an expression set version to show step-result explanations to external users. The example also shows how to preview the explanations that your users see.
• Compare Expression Set Runs with Decision Explainer
  To analyze why an expression set generated different outputs for each run, enable Decision Explainer for expression set versions, and then use the Compare option on the Decision Explainer Log History component. Decision Explainer logs are generated in the context of object records that an expression set is run for. To use the Compare option, the Decision Explainer Log History component must be enabled on the record page of the object within whose context the expression set is run.
• Explainability Message Templates for Developers
  Developers in your Salesforce org can use developer resources to use and extend explainability message templates.