Workshops are likely the most efficient way for management to self-assess the overall effectiveness of the controls in a 200-person manufacturing department. Workshops can facilitate interactive discussions and group activities that help identify control gaps, understand employee perspectives, and consolidate feedback effectively across a large group.References: Best practices in internal control assessments and organizational development literature.

In this situation, the internal auditor violated the IIA's Code of Ethics by using confidential information obtained during an audit (salary data) for personal gain (negotiating work conditions). This action breaches the confidentiality and objectivity principles outlined in the IIA Code of Ethics, which require auditors to refrain from using information for any personal advantage or in a manner that would be detrimental to the legitimacy or trust of the audit function.References: Institute of Internal Auditors (IIA) - Code of Ethics