What do some experts consider the calculation of return on investment (ROI) to be in terms of Kirkpatrick's model of training evaluation?

Question

Quizplus · Accepted Answer

Kirkpatrick's model originally had four levels of training evaluation: Reaction, Learning, Behavior, and Results. The calculation of return on investment (ROI) is considered an extension of this model, often referred to as Level 5, which specifically evaluates the financial return on the investment in training.

What Do Some Experts Consider the Calculation of Return on Investment