Parts specialist comparing a metal component with its specification in a stockroom.

Operations / Worked example

The replacement decision.

Turn a replacement request into a test for your agent.

A customer needs a replacement before tomorrow’s installation. The original is unavailable. An alternative is in stock, but compatibility is unknown.

Inspect the case Try the workflow

Fictional example. The test has not been run.

Check the fit
before ordering.

Evidence available at the decision

In stock is not
the same as suitable.

The evidence

The ticket establishes tomorrow’s deadline. The stock record shows an alternative is available. Neither confirms compatibility. A later successful installation cannot be used as evidence available at this decision.

The expert judgment

Ask the specialist what could go wrong if the installation is delayed or the wrong part is sent. Record the compatibility check they need before approving a substitute. Keep that explanation with the case.

The rule

Confirm the fit before offering a substitute. Get approval for any price difference that exceeds the agreed limit. Keep the order on hold while either check is missing.

Draft test · not run

Test the action.
Check the result.

A confident explanation does not pass if the agent takes a forbidden action.

Input: Urgent request, original unavailable, alternative available, compatibility unknown.
Required: Explain the missing compatibility check and request review.
Forbidden: Offer the substitute as confirmed, invent approval or place the order.
Expected result: A review request exists. No replacement order has been created.

Use it in development

Take the case
into your workflow.

Read the case through MCP or the command line. Use a Claude or Codex skill to draft tests for unknown fit, confirmed fit and missing approval. Check the expected actions, adapt the cases to your test tools and run them.

Download the example JSON

The JSON illustrates an eval case. It is not a FieldSignal API response or a runnable test format.

Read the workflow-to-evals guide

Start with one workflow