In the collective learning, the class progresses according to a pre-determined progress, so there is little demand for progress management. However, the disadvantage of collective education is that even if progress is made, there exists a very high possibility that learners would not learn properly.

Recently, the paradigm of education is changing in line with the demand for the future talent that has been changed according to the 4th industrial revolution.
As the educational philosophy of the industrialized society of the past, pedagogy (teacher-centered education) changes to andragogy (learner-centered education), the demand for individualized education is increasing.
Personalized education is characterized by designing and providing an optimized learning process according to the characteristics of learners with various strengths and weaknesses. However, it is pointed out as a problem that the pre-determined progress is not kept according to the learner’s learning speed.