Skills and certifications are defined by the organization. Certifications are also awarded by an accredited certification agency. For example, if a field worker has completed a training course or has acquired an accredited license, certification is awarded to the field worker. Skills indicate that a field worker is capable of performing a certain kind of work like carpentry or installing a window or a door. The field worker's skill level can range from 1 to 10. For example, installing a door or window requires a higher level of skill and repairing a door or a window requires a lower level of skill. Assign skills and certifications to the field workers to indicate what work the field worker can perform.