A part-time job is a form of employment that carries fewer hours per week than a full-time job. Workers are commonly considered to be part-time if they work fewer than 30 hours per week.[2] Their hours of work may be organised in shifts. The shifts are often rotational.
According to the International Labour Organization, the number of part-time workers has increased from one-quarter to a half in the past 20 years in most developed countries, excluding the United States.[2] There are many reasons for working part-time, including the desire to do so, having one's hours cut back by an employer and being unable to find a full-time job. The International Labour Organisation Convention 175 requires that part-time workers be treated no less favourably than full-time workers.[3]
In some cases the nature of the work itself may require that the employees work part time. For example, some amusement parks are closed during the winter months and keep only a skeleton crew on hand for maintenance and office work. As a result of this cutback in staffing during the off season, employees who operate rides, or run gaming stands or staff concession stands may be classified as part-time workers owing to the months-long down time during which they may be technically employed, but not necessarily on active duty.