ISO 16484-3:2005规定了实现楼宇自动化和控制系统的整体功能和工程服务的要求。它定义了用于规范的术语，并为项目/应用特定系统的功能文档提供了指南。它提供了一个用于记录工厂/应用程序特定功能的样本模板，称为BACS点列表。 信息功能块示例解释了在系统文档中显示参考功能的方法；它们没有标准化函数和应用程序的编程方法。 ISO 16484-3:2005涵盖了有关BACS和应用软件、工厂/项目特定应用的通用功能以及建筑控制和操作的工程功能的要求和定义。它为其他专用系统过程的集成提供通信功能。 ISO 16484-3:2005定义了一种规定采购规范的方法，其中包含BACS运行所需的所有基本要素。BACS的成功安装和运行要求其采购基于完整准确的功能规范。

ISO 16484-3:2005 specifies the requirements for the overall functionality and engineering services to achieve building automation and control systems. It defines terms, which shall be used for specifications and it gives guidelines for the functional documentation of project/application specific systems. It provides a sample template for documentation of plant/application specific functions, called BACS points list. The informative function block examples explain a method to display the referenced functions in system documentation; they do not standardize the method for programming functions and applications. ISO 16484-3:2005 covers requirements and definitions regarding BACS and application software, generic functions for plant/project specific applications and engineering functions for building controls and operations. It provides communication functions for the integration of other dedicated special system processes. ISO 16484-3:2005 defines a method for specifying the procurement specifications containing all essential elements required for the operational functioning of a BACS. The successful installation and operation of a BACS requires that its procurement be based on a complete and accurate functional specification.