1. Production process problem: the production process of Wanli Plastic Factory is imperfect or not optimized, which leads to waste and inefficiency in the production process and increases labor intensity and workload. Unreasonable process or outdated equipment will lead to a bad working environment and further aggravate the fatigue of factory employees.
2. Insufficient staff or training: If the number of employees in the plastic factory is insufficient or employees have not received enough training, then a few employees need to undertake more workload, which will lead to the extension of working hours and the increase of work intensity, which will lead to physical fatigue and psychological stress. Without proper training and support, employees will encounter more difficulties and challenges in their work, which will increase their sense of urgency and fatigue.