A functional flow block diagram (FFBD) is a multi-tier, time-sequenced, step-by-step flow diagram of a system's functional flow. [2] The term "functional" in this context is different from its use in functional programming or in mathematics, where pairing …

最常见的是功能流程框图（ffbd），数据流图（dfd）、n2 图、idef0 图和行为图（bd）。 所有这些图形表示使工程师能够分层分解功能和/ 或数据模型。 本文的目的是分析这些图形语言的表示能力，从而探讨统一的视图的存在性。

2023年1月3日 · FFBD：是功能技术分解定义，是将产品功能转换为技术需求的一种工具。FFBD分别为：Function 功能；Feature 技术特性；Breakdown 分解；Definition 定义。 第四步：找共享的技术和模块. 将每个单机产品，按照单机、模块、组件进行FFBD分解，直到找到技术和子技术。

FFBD. The purpose of the functional flow block diagram (FFBD) is to describe system requirements in functional terms. Objectives The FFBD is structured to ensure that: • All life cycle functions are covered. • All elements of system are identified and defined (e.g. prime equipment, training, spare parts, data, software, etc.).

The Function Flow Block Diagram (FFBD) was the first to be favored by systems engineers and continues to be widely used today (DSMC 1989, Blanchard and Fabrycky 1990). Figure 1 shows a sample FFBD. An FFBD shows the functions that a system is to perform and the order in which they are to be enabled (and performed).

Functional block diagrams (FBDs) let you do just that. They’re like blueprints for your project, breaking down complex systems into simpler, manageable parts. But what exactly are they, and why should your product team care?

♦ A primary functional analysis technique is the Functional Flow Block Diagram (FFBD). ♦ Purpose: to show the sequential relationship of all functions that must be accomplished by a system.

The FFBD is often used in conjunction with an N2 diagram to provide a more complete representation of behavior. The FFBD is available for entities in the Function class (as well as any other subclasses of ProcessingUnit ).

传统的系统工程中功能建模大多采用功能流模块图（FFBD）、EFFBD、N2图、IDEF0以及行为图（BD）等实现。 本文从系统工程角度对功能进行理解和定义，将功能视为对输入流元素集合的转换作用。 虽然Gero在FBS方法中将功能、行为、结构三种概念特征称为设计知识，但随着模型化的趋势发展，在对该方法的延伸研究中，对设计特征知识进行建模，逐步将其发展成一种基于模型的产品系统概念设计方法，相应地，对应的设计说明书也演变为模型表达的系统设计方案，或称 …

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