设置中层经理职业发展通道是世界顶级公司的常规做法。学习、研究、借鉴、创新这一有价值的经验，在知识经济浪潮扑面而来的今天，对营造公司业务发展与中层经理职业发展双向牵引良性循环的组织气氛更加具有深远的战略性价值。 ｌ、中层经理的工作与贡献价值分类 （ｌ）Ｄ类工? Setting up a career channel for middle managers is a common practice in the world's top companies. The valuable experience of learning, research, reference and innovation is far more strategic and valuable to the organizational atmosphere of creating a virtuous circle of two-way development of the company's business development and the career development of middle-level managers. l, the role of middle managers and contribution value classification (l) D class workers?