ISO 16439:2014定义了图书馆影响评估的术语，并规定了此类评估的方法:用于图书馆的战略规划和内部质量管理；促进比较图书馆在一段时间内的影响，以及类似类型和任务的图书馆之间的影响；促进图书馆在学习和研究、教育和文化、社会和经济生活中的作用和价值；支持有关图书馆服务水平和战略目标的政治决策。 ISO 16439:2014考虑了图书馆对个人、机构和社会的影响。它适用于所有国家的所有类型的图书馆。然而，并不是所有描述的方法都适用于所有库。 说明中规定了各种方法的适用性限制。

ISO 16439:2014 defines terms for impact assessment of libraries and specifies methods for such assessment: for the purpose of strategic planning and internal quality management of libraries; to facilitate comparison of library impact over time and between libraries of similar type and mission; to promote the libraries' role and value for learning and research, education and culture, social and economic life; to support political decisions on levels of service and strategic goals for libraries. ISO 16439:2014 considers the impact of libraries on individuals, institutions and society. It is applicable to all types of libraries in all countries. However, not all methods described apply to all libraries. Limitations on the applicability of individual methods are specified in the descriptions.