Daily Chinese Idiom Guessing Game
To follow the prescribed order or routine; to stick to established procedures.
部、班门类，次序；就归于。按照一定的步骤、顺序进行。也指按老规矩办事，缺乏创新精神。
晋·陆机《文赋》然后选义案部，考辞就班。”
He preferred to work creatively, but his boss insisted on doing everything 按部就班.