Improvements begins outside the box.
There are two elements to human performance: 1) technical knowledge and 2) technical skills. Knowledge is the theory of operations, while skills is the operations itself. At the initial licensing of a pilot, the candidate first must pass a knowledge test, and then a practical flight test. Without passing at an acceptable risk level, a pilot license cannot be issued. As the pilot is employed, this concept of refreshing both technical knowledge and technical skills becomes a concept of operational performance.
Normally a person’s retention of learning decreases with time when learning is not applied to operations. Much of the theoretical learning is not applied daily in the job, but occasionally with the use of checklist. The highest percentage-loss occurs in the first days and weeks after the leaning is completed and somewhat levels off after that. Since the learning is being applied in their skills performance by flying an aircraft daily, there is additional learning occurring on the job and their performance level of technical skills are improving in the days and weeks after the learning.
One enterprise was expecting their pilots to retain a 100% knowledge level one year after the training and would initiate the refresher course with the knowledge test and expect all candidates to be as proficient in knowledge as they were 365 days ago. Since pilots only applied part of their knowledge regularly in the day to day job and learning was not encouraged, most of what was learned had been forgotten in 365 days. Since their jobs were dependent on passing the knowledge test, the candidates would do their own and personal refresher course the last 2-3 weeks prior to the official refresher course. When the test was take all candidates passed and the enterprise could proudly check off the box that their pilots had retained 100% knowledge in 365 days.
When assessing risk levels differently an enterprise would assess performance based on a pilot’s retention of knowledge and skills. Let’s assume the learning retention loss of knowledge is 20% per day for the first 84 days and from then on, the retention loss is 2% per day to 365 days. At the end of a year the total knowledge retention is 20%, or in other words, if the pilot took the test without studying after 365 days, it would be expected that the test result would be 20% of last result.
Their technical skills retention for pilots are not reduced after learning, but their performance is getting better since they are applying their skill in their day to day job and additionally being exposed to known and unknown hazards regularly. At the end of 365 days the pilot retention levels are 180% of what it was after the previous flight test.
When applying this data as a combined retention level factor of knowledge and skills, the pilots are performing at their 100% level after 365 days. After 5 years in the same job they are performing above their 100% initial level.
Performance factor most critical days are days 60-80.