Which of the following performance measures is considered a lagging indicator to the largest degree?

Lagging indicators measure outcomes after the fact, while leading indicators provide predictive insight. Return on investment (ROI) is the most lagging because it measures financial performance after investments and operations have already occurred.

Customer retention (B) and employee satisfaction (C) are more intermediate indicators.

Cost of R&D (D) is a leading indicator, as it influences future innovation.

Thus, ROI is the most lagging indicator.