The four-level evaluation model of offset is as follows: Level 1 response evaluation: evaluating students' satisfaction. Secondary learning: measure the degree of learning acquisition of trainees. Three-level behavior evaluation: to investigate the degree of knowledge application of trainees. Level4 Result: Calculate the economic benefits created by training.

1, Level 1: response evaluation is the first level in the four-level evaluation model, which mainly evaluates the overall response and feelings of the trainees to the training.

2. This level of assessment is usually done through questionnaires or face-to-face interviews. Questionnaires or interviews can include overall satisfaction with training, evaluation of training content and methods, and evaluation of lecturers. This level of assessment helps to improve the design and implementation of training to meet the needs and expectations of trainees.

3.Level2: Learning evaluation is the second level of the four-level evaluation model, which mainly measures the knowledge, skills and abilities acquired by trainees during the training process.

4. This level of assessment can be conducted by means of tests, examinations and simulation exercises. For example, the same test can be conducted before and after the training, and the academic performance of the students before and after the training can be compared to determine the effectiveness of the training and the learning effect of the students.

5.Level3: Behavior Evaluation is the third level of the four-level evaluation model, which mainly examines how trainees apply the knowledge and skills they have learned in their work.

6. This level of evaluation can be carried out through the observation, feedback and evaluation of colleagues or superiors. For example, you can observe and feedback the trainees' application of knowledge and skills at work within a period of time (such as one month, three months or half a year) after the training, so as to determine the actual effect of the training.

7.Level4: The result evaluation is the last level of the four-level evaluation model, which mainly calculates the economic benefits and effects generated by the training. This level of evaluation can be carried out by comparing the business data before and after training.

8. For example, by comparing the changes of work efficiency, error rate and customer satisfaction before and after training, we can judge the return on investment of training, that is, the economic benefits generated by training.