Inactive Employee Identification in Workflows

Summary

Identification of Inactive Employees in a workflow

Content

Invoice workflow gets triggered when it find all the levels of approvers in the workflow and this can be broken down into 4 different cases.

Case 1 : When the approval initiated, if any one of the approver is in-active (or gaps in hierarchy), approval is getting rejected. This is expected functionality. But, how would business user know that there is an existing in-active employee hierarchy ? It takes internal IT team support to troubleshoot why it is failing and this is adding in-efficiencies to the process.
Expectation: System should be intelligent enough to project this to user on the potential failure on workflow. How to achieve this ? please advise.