一、职业定义供水调度工是指掌握和熟悉本区域供水系统，依据调度基本原则、制度、规程和供水系统的能力，经济合理地调度给水系统运行、最大限度地满足城镇用水需求的人员。本职业分为初级、中级、高级三个等级。分别对应国家职业资格五、四、三级。学徒期为三年。其中培训期? I. Definition of occupation Water supply dispatching workers refer to persons who grasp and are familiar with the water supply system in the region and economically and rationally dispatch the water supply system to meet the needs of urban water supply based on the basic principles, systems, procedures and the ability of the water supply system. The occupation is divided into primary, intermediate, advanced three levels. Respectively corresponding to national vocational qualifications five, four, three. Apprenticeship period of three years. Which training period?