This indicator shows the percentage of adult employees who report that their skills are lower than required to perform their current job. Workers’ skills may be below the level needed because the skill needs of their jobs may change over time, due to new technologies, production methods and forms of work. Individuals are more likely to be underskilled in industries and occupations with high and fast-paced skill needs (e.g. professional and scientific services, advanced manufacturing). Under-skilled workers are more concerned that they will lose their job in the near future (they have higher job insecurity). They require higher levels of continuing vocational training to upgrade their skills and remain productive in their jobs. As the indicator is based on the subjective opinion of employees, they may have a tendency to underestimate the extent to which their skills are lower than actually needed by their jobs.