paraphrase: While Kaufman's model offers a thorough evaluation framework, its complexity can pose challenges for implementation. Assessing all five levels of the model requires significant time, resources, and expertise, which may be beyond the capabilities of small organizations or those with limited evaluation capacity. Moreover, the intricacies involved in measuring higher levels of evaluation, such as behavior change and ROI, can further complicate the process, potentially leading to incomplete or inaccurate assessments