A workforce reduction that results in the loss of a significant number of employees. Usually this refers to a significantly large layoff of a certain percentage of active employees which is covered by the Federal WARN Act (Worker Adjustment and Retraining Notification Act of 1988). It requires most employers with at least 100 employees to provide no less than 60 calendar days advance notice to employees of the termination of their employment or a reduction in at least 50% of work hours.