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Systems Engineering Used for Logistics Integration in Product Design

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Systems Engineering Used for Logistics Integration in Product Design Journal of Traffic and Logistics Engineering Vol. 3, No. 2, December 2015 Systems Engineering Used for Logistics Integration in Product Design Samir Ben Abdallah1, Maher Aidi2, Alaeddine Zouari 2, and Aref Maalej1 1University of Sfax LASEM Laboratory ENIS, Sfax, Tunisia 2University of Sfax Quality Department ISGI, Sfax, Tunisia Email: { benabdallah.isggb, maher.aidi, Ala.zouari }@gmail.com; [email protected] Abstract—Logistics costs have a significant share of total In this work, we define the methodologies of logistics product costs. Consequently, a company may be able to integration in collaborative product design using the reduce costs, and thereby gain an edge on its competitors, by concept of systems engineering. improving the fit between product design and logistics. However, current engineering design organizations and OGISTICS AS NTEGRATION IN THE RODUCT tools are not suited for structuring proper interface between II. L I P engineering and logistics. This paper presents – at first- a DESIGN PROCESS ELEMENT. literature review pertaining to the issue of logistics integration in product design. In this context, we propose an A. Tools and Approaches for Integrating Logistics in approach based on systems engineering. This approach Product Design. integrates the logistics requirements in product design To support the development of the actors skills through the identification and characterization of these requirements according to the concepts of requirements involved in both product design engineering and logistics engineering and design tools such as QFD and FMEA. process, the literature provides some methods that can facilitate integration. Design For Logistics (DFL) [4] and Index Terms—logistics, product design, systems engineering Design For Supply Chain Management (DFSCM) [5] have been described in literature as effective ways to take into account Supply Chain concerns in the Product I. INTRODUCTION Design early phases. Dowlatshahi [4] has developed a Design For Logistics Product design is the creation of a synthesized solution model to integrate Logistics-related issues (plant location, that satisfies the needs. This usually involves the material management, storage, traffic, packaging, etc.) in consideration of various parameters and alternative the early phases of Product Design process. In this configurations of various components. As a prevalent approach, Supply Chain concerns are embedded in methodology, Concurrent Engineering (CE) interfaces, modelled according to four disciplines: simultaneously designs products and related processes by Logistics engineering, Manufacturing Logistics, Design integrating resources into a collaborative course to for Packaging, and Design for Transportability. develop, manufacture, and deliver economically quality Lee and Billington [6] assert that one of the common products [1]. pitfalls in managing Supply Chain is to overlook Logistics is defined as the art and science of managing inventory, distribution and planning costs during the and controlling the flow of goods, energy, information product-process design. The authors also claim that the and other resources, e.g. products, services, and people, product-process design should be evaluated not only in from the source to the marketplace [2]. terms of functionality and performance, but also in terms Because of the substantial costs involved in logistics of Design For Supply Chain Management (DFSCM), i.e., activities, the lack of integration logistics in product costs and serviceability issues. design is an important and challenging issue to be addressed. B. Literature Review on Logistics Integration in To carry out the integration of logistics in product Product Design. design, the consideration of this problem’s characteristics To locate the research question of the logistics is required, both in terms of actors to promote the integration in product design, a lot of researches methods and tools to support it. Moreover, systems interested in this issue have been identified, among which engineering is a general approach that encompasses all the following can be mentioned: the appropriate activities to design, develop and verify a The Design for Logistics (DFL) and the Design for system by providing an optimized solution to a client's Supply Chain Management (DFSCM) [4] propose a set of needs while satisfying all the stakeholders [3]. rules and methods to take into account the logistical constraints in product design. These studies put forward the benefits of qualitative concepts such as the modular design, the delayed differentiation and some other rules. These rules suggest the reduction of component number Manuscript received October 20, 2014; revised April 21, 2015. ©2015 Journal of Traffic and Logistics Engineering 185 doi: 10.12720/jtle.3.2.185-188 Journal of Traffic and Logistics Engineering Vol. 3, No. 2, December 2015 or used references, as well as suppliers’ integration in the Besides, the specified requirements are validated against upstream phase of design projects. This helps lower the the previous level. Furthermore, the verification activities costs related to storage and product transportation. and system validation are anticipated and planned in Dowlatshahi [5] proposes a mathematical method to take terms of the expected. Once the realization phase of the into consideration these logistic constraints. elementary components is realized, the right branch of the In his research, Koike [7] shows that the interactions cycle is integration, verification and validation of the between the logistics and engineering have not a good system under the initial need [9]. integration yet. In fact, his thesis presents the problematic The notion of V Cycle is a concept pertaining only to of the integration of logistics in the manufactured projects one part of the product life cycle which begins with a of product design (case of a worldwide manufacturer of concept, then passes through a requirements engineering construction equipment). He proposed an interface model phase, and after that through a design phase in which the to support integration and a tool to integrating the famous V-cycle is included. Subsequently, it passes Logistics Profile. Moreover, he emphasized the crucial through a phase transfer to the user, production, role played by the interfaces as a catalyst for the creation maintenance and withdrawal service and disintegration. of new knowledge and competencies at the frontiers ISO / IEC 15288: "System life cycle processes" between logistics and product engineering. perfectly describe the system life cycle. These cycles consist of processes considered as sets of C. Limitations and Analysis of Previous Researches.. activities to be undertaken to transform inputs into output Dowlatshahi [5] did not explain, from this model and elements. its factors, how requirements or rules can be developed to Our approach consists in the proposition of design activities and how they can be formalized and requirements for the integration of logistics processes in used in the early phases of the project. the upstream product design through requirements Logistics Profile tool by Testsu Koike [7] has some engineering phases, taking into account the strategic limitations to its use, among which we can mention: needs and operational logistical constraints in the early Logistics Profile is dependent on the context in stages of product design. which it is used. Logistics Profile needs an entire structure for its use. Deployment Logistics Profile depends on the existence of a preliminary alternative design solution. Logistics Profile does make sense in a logical change, i.e., in the context supported by a suitable application structure. Its use requires a depth from the learning step to the interface. In our research, we consider an environment in which the integration of logistics is a goal during the projects of product design. Compared to literature, we use the systems engineering as well as a method that helps integration. III. SYSTEMS -ENGINEERING-BASED APPROACH In this paper, the integration methodology of logistics in the cooperative product design is described by integrating the concept of systems engineering. Our research can be considered as a continuity of Dowlatshahi [5] and Tetsu Koike works [7]. To control product design and its realization, while Figure 1. Integration model based on requirements engineering. taking into account the whole product life cycle from the needs identification until the completion of the withdraw In our model (Fig. 1), systems engineering is adopted service, it is necessary to think of the systems engineering as an integration method of logistics in product design. discipline. We think that systems engineering is more Systems Engineering (SE) is an interdisciplinary comprehensive than the other methods discussed in the approach to a structured, disciplined, and documented literature approach. technical effort. It allows the simultaneous design and The systems engineering is to identify a solution to a development of systems, products and processes while specific need. A set of processes (activities) has been satisfying customers‘ needs and requirements [8]. defined to perform the gradual transformation of the need The V-cycle has become the main development cycle into stakeholders requirements then into a technical SE, is divided into two branches. In the descending requirements system, then into functions, and finally into branch, specification and system design are carried out. concrete
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