Law of 28. According to the query, Douding.com shows. The "28 principle", also known as the "80-20 efficiency rule", originated from the Italian economist Pareto, that is, 20% factors often determine the outcome of 80% things. This principle is also called "important minority and general majority". This principle also applies to enterprise training. 80% of enterprises have carried out the first-level or second-level assessment, but only 20% of enterprises have carried out knowledge transformation. 80% of the training has become the knowledge accumulation of the students; 20% training has produced economic benefits; 80% enterprises are doing training, but only 20% enterprises have carried out knowledge management. This is also the 28 law of enterprise training absorption rate.