The production manager might perform personal inspections or oversee a group of quality-control workers. Routine preventive maintenance on manufacturing equipment can be important to avert potential standstills in production.
Toenails typically fall off due to either fungal infection or injury that results in a separation of the nail from the area of the toe called the nail bed, according to Foot Vitals. While pain is common with this type of injury, it is not guaranteed.
If just the nail, this is probably not serious. It is most likely just bleeding or dried blood beneath the nail plate, you may eventually lose the nail, but a new one will grow in over time. If it is the toe itself, then a clot or circulation compromise may be the cause and that is more serious. Consult a foot specialist who can better evaluate.