Sparks were reported coming from an electrical circuit on the 3rd floor of a factory by one of the factory operators. When workers attempted to ring the fire alarm, it did not work. A similar event occurred a short time later the same morning. After being notified, management allowed workers to leave the building until the cause of the sparks could be resolved and the malfunctioning fire alarm could be fixed. Some days later, calls to workers in the building confirmed that the problems had been resolved