Based on job description, job specification or job task analysis records, the job task analysis method determines the knowledge, skills and attitudes that employees must master in order to meet the requirements, and compares them with the performance of employees in their usual work, so as to determine the gap of employees in completing their work tasks. Task analysis is a very formal training demand investigation method, and its conclusion is highly reliable, but it takes a lot of time and money, and is generally only used in some very important training projects.