Set-Based Design for Lean Delivery of Reinforced Concrete Structures

CMS 0511044将进行研究，整合和加强钢筋设计、制造和安装的流程，以实现系统的改进。如今的螺纹钢行业高度分散。目前REBAR的交付过程主要是按顺序进行的，采用耗时且低效的提交过程，对参与者奖励不足，阻碍创新，并促进局部次优化。为了揭示过程改进的机会，可构造性被整体地看待。如果设计更安全，缺陷风险更小，时间更短，成本更低，那么设计就更好；然而，在更高的水平上--就本研究的观点而言--设计的可施工性是项目最佳工作结构策略的函数。将研究一种有前景的、遵循精益施工原则的设计钢筋的新方法。研究包括：(1)定义和开发一种新的方法和元语言来表示有关设计和构件属性的数据，以确保这些数据可以贯穿钢筋交付的所有阶段；(2)制定设计规则，以反映专家的知识、技能和能力，以确保钢筋混凝土结构的卓越质量，同时考虑到他们共同工作的项目的具体情况；(3)阐明和测试建模工具，包括基于集合和可视化的建模工具，使团队能够以系统和有效的方式探索具有目标特征的设计备选方案，并选择满足许多(如果不是全部)约束和偏好的解决方案，以及(4)开发流程和组织理解如何在并行工程中吸引多学科的专家团队，以便生成比当今基于点的设计更有价值的设计。采用这种新方法可能会引导该行业进行重组，以增强其全球竞争力。以钢筋混凝土建造的基本工程项目的交付涉及大量专家。专业化已经演变为反映了我们今天用来构建结构以满足日益严格的所有者和社会要求的先进技术理解和能力。然而，专业化的需要与该行业的碎片化齐头并进，导致了远未达到最佳交付过程的结果。本研究以混凝土(钢筋)中用作钢筋的钢筋为研究对象，研究其设计者与制造者之间的关系。其目标是开发新的理论并说明其应用实践，以提高钢铁行业这一部门的能力、业绩和竞争力。将研究一种有前景的、遵循精益施工原则的设计钢筋的新方法。这些原则建立在团队合作、探索备选方案集和推迟承诺的基础上，直到有足够的数据可供团队做出明智的决定。采用这一新方法可能会引导该行业进行重组，以提高其全球竞争力。

Abstract for CMS 0511044Research will be conducted to integrate and enhance the processes for design, fabrication, and installation of steel rebar in order to achieve systemic improvements. Today's rebar industry is highly fragmented. The current delivery process for rebar is predominantly sequential, employs a time-consuming and ineffective submittal process, under-rewards participants, discourages innovation and promotes local sub-optimization. To reveal the opportunities for process improvement, constructability is viewed holistically. A design is better if it can be constructed more safely, with less risk of defects, in less time and at less cost; at a higher lever, however- and the way it is viewed in this research - the constructability of a design is a function of the optimum work structuring strategy for the project. A promising and new approach to design rebar, following lean construction principles, will be investigated. The research includes (1) definition and development of a new methodology and meta-language to represent data about design and component attributes, do that this data can be carried forward through all phases of rebar delivery; (2) formulation of design rules to reflect the knowledge, skills, and ability of a specialists to work together to assure superior quality of reinforced concrete structures while taking into account the specific circumstances of the project they are jointly working on; (3) articulation and testing of modeling tools including set-based and visualization to enable teams to explore design alternatives with target characteristics in a systematic and efficient way and choose solutions that meet many if not all of their constraints and preferences, and (4) development of process- and organizational understanding of how to engage multi-disciplinary teams of specialists in concurrent engineering in order to generate a design that is of greater value than today's point-based design are. Adoption of this new approach may steer the industry towards restructuring so as to boost its global competitiveness.Numerous specialists are involved in the delivery of capital projects made of reinforced concrete. Specialization has evolved to reflect the advanced technological understanding and capabilities that we exploit today to build structures to meet increasingly stringent owner and societal requirements. The need to specialize, however, has gone hand-in-hand with fragmentation of the industry resulting in a far-from-optimal delivery process. This research focuses on the steel that is used as reinforcing bar in concrete (rebar) and studies the relationships between those who design it and those who make it. The goal is to develop new theory and illustrate its application practice, in order to increase the capabilities, performance, and competitiveness of this sector of the steel industry. A promising and new approach to design rebar, following lean construction principles, will be investigated. These principles build on teamwork, exploration of sets of alternatives and postponement of commitments until sufficient data is available for the team to make an informed decision. Adoption of this new approach may steer the industry towards restructuring so as to boost its global competitiveness.