Final answer:
The Informal Resolution System is used to resolve EO complaints within the chain of command before escalating to more formal procedures, contrasting with formal systems that can result in sanctions.
Step-by-step explanation:
The system for resolving Equal Opportunity (EO) complaints at the lowest appropriate level in the chain of command is the Informal Resolution System (IRS). This is part of the broader EO framework that organizations use to ensure fairness and prevent discrimination. The IRS provides a means for individuals to address and resolve complaints informally before progressing to formal complaint processes. This can involve dialogue and mediation, and is typically seen as a way to resolve issues quickly and without the need for more formal disciplinary measures. The IRS contrasts with formal resolution systems, which involve more structured procedures and can lead to formal negative sanctions or formal positive sanctions, depending on the outcomes.