Other United Nations organizations and their governing bodies have acknowledged that RBM is an evolutionary process taking several years and requiring a learning period as well as major changes in the management processes and organizational culture.
其他一些联合国组织及其理事机构认识到实绩管理是一个历时几年的演进过程，并需要一个学习时期以及对管理方法和组织文化作重大变革。