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- A lack of _skills_
- DONE Week 3
- ## topic 11
系统级设计（System-level Design）
- 系统级设计（System-level Design）
产品架构可以描述为 :“ 将产品的功能元素排列成物理块以及块之间相互作用的方案”功能性——有助于整体绩效的单个操作和转换.物理–实现产品功能的零件、组件和子组件（通俗来讲，顺序是完成相应功能的零件component--->组件 chunks---->产品，产品架构就是以实体组件来实现产品的各功能单元，并使各组件相互作用的配置方案） Product Architecture can be described as: 1."the scheme by which the functional elements of the product are arranged into physical chunks and by which the chunks interact” 2.Functional – individual operations and transformations that contribute to its overall performance 3.Physical – parts, components and subassemblies that implement the product’s functions
目的：架构决策允许将这些物理模块的详细设计和测试分配给团队、个人和 /或供应商，以便不同部分的开发可以同时进行 Architectural decisions allow the detailed design and testing of these physical blocks to be assigned to teams, individuals, and/or suppliers, so that the development of different portions can be carried out simultaneously
- 目的：架构决策允许将这些物理模块的详细设计和测试分配给团队、个人和 /或供应商，以便不同部分的开发可以同时进行 Architectural decisions allow the detailed design and testing of these physical blocks to be assigned to teams, individuals, and/or suppliers, so that the development of different portions can be carried out simultaneously
- 模块化架构Modular & integral architecture
◦ 模块化架构 modular architecture 特点：1.各个组件分别实现一个或多个功能 2.组件之间的关系是明确的，这种关系往往是实现一个产品功能的基础 ·Each chunk implements one or a few functions entirely. ·The interactions between chunks are well defined. ·Modular architecture has simplicity and reusability for a product family or platform. 理解：当每个功能都只被一个组件完成时，并且组件之间的配合十分完美时，这种架构允许在不改变的情况下只改变一组而不影响整体功能。也就是说各个组件可以单独设计
▪ 槽形模块架构 Slot-modular (the most common type) 每个接口都与于其它接口类型不同，产品中的组件不能互换 Each of the interfaces between chunks in a slot-modular architecture is of a different type from the others – therefore the various chunks in the product cannot be interchanged 例子：汽车上的收音机接口与速度仪、仪表盘的接口都不同
▪ 总线模型 Bus-modular 有一个通用总线，其他组件通过同类型的接口连接到这个总线上 There is a common bus to which the other chunks connect via the same type of interface 例子：轨道照明
▪ 组合型模块架构 Sectional-modular 所有接口都是同类型的，但是没有一个所有组件都与之相联的元件。组装是通过将同样的接口相连接而完成的 1.All interfaces are of the same type, there is no single element to which all the other chunks attach 2.The assembly is built up by connecting the chunks to each other via identical interfaces 例子：分体沙发
▪
- ◦模块化架构 modular architecture 特点：1.各个组件分别实现一个或多个功能 2.组件之间的关系是明确的，这种关系往往是实现一个产品功能的基础 ·Each chunk implements one or a few functions entirely. ·The interactions between chunks are well defined. ·Modular architecture has simplicity and reusability for a product family or platform. 理解：当每个功能都只被一个组件完成时，并且组件之间的配合十分完美时，这种架构允许在不改变的情况下只改变一组而不影响整体功能。也就是说各个组件可以单独设计
- ▪ 槽形模块架构 Slot-modular (the most common type) 每个接口都与于其它接口类型不同，产品中的组件不能互换 Each of the interfaces between chunks in a slot-modular architecture is of a different type from the others – therefore the various chunks in the product cannot be interchanged 例子：汽车上的收音机接口与速度仪、仪表盘的接口都不同
- ▪ 总线模型 Bus-modular 有一个通用总线，其他组件通过同类型的接口连接到这个总线上 There is a common bus to which the other chunks connect via the same type of interface 例子：轨道照明
- ▪ 组合型模块架构 Sectional-modular 所有接口都是同类型的，但是没有一个所有组件都与之相联的元件。组装是通过将同样的接口相连接而完成的 1.All interfaces are of the same type, there is no single element to which all the other chunks attach 2.The assembly is built up by connecting the chunks to each other via identical interfaces 例子：分体沙发
- ▪
- ▪ 产品架构的含义 你所做的关于产品架构的决定是有影响的 产品变化 模块化块允许对产品的一些孤立的功能元素进行修改，而不一定影响其他块的设计 改变的动机包括——升级、附加、适应、磨损、消耗、使用的灵活性、重复使用 There are implications to the decisions you make about product architecture ·Product change ·Modular chunks allow changes to be made to a few isolated functional elements of the product without necessarily affecting the design of other chunks ·Motives for change include – upgrades, add-ons, adaptation, wear, consumption, flexibility in use, reuse
▪ 积簇 多样性指的是企业在特定时期内根据市场需求所能生产的产品模型的范围 围绕模块化产品架构构建的产品可以更容易地变化，而不会给制造系统增加巨大的复杂性 例如移动电话手机设计、便携式音频 Product variety l Variety refers to the range of product models the firm can produce within a particular time period in response to market demand l Products built around modular product architectures can be more easily varied without adding tremendous complexity to the manufacturing system
◦ 集成化架构 Integral architecture 特点：1.产品的每个功能由多个组件组成 2.每个组件参与多个功能的单元实现 3.组件之间的互相关系不明确，这种相互关系对基本功能来说不重要 理解：不同于模块化结构，因为集成化结构的功能是由多个组件构成的，所以改变一个功能或者零件都涉及到多个组件的改变
- ▪ 积簇 多样性指的是企业在特定时期内根据市场需求所能生产的产品模型的范围 围绕模块化产品架构构建的产品可以更容易地变化，而不会给制造系统增加巨大的复杂性 例如移动电话手机设计、便携式音频 Product variety l Variety refers to the range of product models the firm can produce within a particular time period in response to market demand l Products built around modular product architectures can be more easily varied without adding tremendous complexity to the manufacturing system
- ◦ 集成化架构 Integral architecture 特点：
- 1.产品的每个功能由多个组件组成
- 2.每个组件参与多个功能的单元实现
- 3.组件之间的互相关系不明确，这种相互关系对基本功能来说不重要 理解：不同于模块化结构，因为集成化结构的功能是由多个组件构成的，所以改变一个功能或者零件都涉及到多个组件的改变
- 建立产品架构（四步法）
◦ 创建产品示意图Create a schematic of the product
▪ 示意图 (schematic) 反映了开发人员对产品组成的认识； 不包含全部细节； 示意图不是唯一的
◦ 对示意图中的元素(单元)进行聚类 (cluster) Cluster the elements of the schematic
▪ 把示意图中的每个元素都划分到相应的组件中去； 为了控制这些选择的复杂性，可以假定每个元素都形成一个独立的组件，然 后在有利的情况下不断加以合并。为了确定哪些合并是有利的，需要考虑以下因素，这些因 素反映了前文所讨论的产品架构的内涵：
- ◦ 创建产品示意图Create a schematic of the product
- ▪ 示意图 (schematic) 反映了开发人员对产品组成的认识； 不包含全部细节； 示意图不是唯一的
- ◦ 对示意图中的元素(单元)进行聚类 (cluster) Cluster the elements of the schematic
- ▪ 把示意图中的每个元素都划分到相应的组件中去； 为了控制这些选择的复杂性，可以假定每个元素都形成一个独立的组件，然 后在有利的情况下不断加以合并。为了确定哪些合并是有利的，需要考虑以下因素，这些因 素反映了前文所讨论的产品架构的内涵：
- • ·几何集成与精确性Geometric integration and precision：把示意图中的几个单元集成到一个组件中，会使设计人员更好地 控制这几个单元的实体关系。这样，就能使出于同一组件，需要精确定位或紧密集成 的单元得到最好的设计。 l·Assigning elements to the same chunk allows a single individual or group to control the physical relationships among the elements l ·Elements requiring precise location or close geometric integration can often be best designed if they are part of the same chunk
• ·功能共享Function sharing： 当一个单独的实体组件可以实现产品的若干功能单元时，这些功能单元最 好集成在一起 When a single physical component can implement several functional elements of the product, these functional elements are best clustered together l For example, an integrated control panel on a car
• ·供应商能力Capabilities of vendors： 一个可靠的供应商可能具有与产品开发密切相关的某种能力。为了很好 地利用这种能力，开发人员会把那些供应商有制造经验的单元集成到同一个组件中， 并交给供应商生产 ·A trusted vendor may have specific capabilities related to a project l· To best take advantage of such capabilities a team may choose to cluster those elements about which the vendor has expertise into one chunk