At-will employees are those who do not have a contract, such as a labor union agreement, with their employer. If you are an at-will employee, your employer can typcally change your job description, duties, title, work location and schedule as he wishes and without providing you advance notice. However, there are certain situations in which an employer can find himself in violation of the law should he choose to alter your job description.

Any practical examples? Is at-will employment a good or bad thing? Shouldn't there be more predictability for the employer and employee?