An internal auditor suspects that employee turnover is unusually high at the organization's primary manufacturing...

To investigate unusually high employee turnover at the organization's primary manufacturing plant, the internal auditor is likely to use benchmarking. Benchmarking involves comparing the organization’s turnover rates with those of similar organizations or industry standards to identify deviations and potential issues. This approach helps in understanding whether the turnover rate is indeed unusually high and what factors may be contributing to it.

IIA Practice Guide: Benchmarking in Internal Audit

IIA Standards: 1220 - Due Professional Care