Product Life-Cycle Modeling and Evaluation at the Conceptual Design Stage: A Digraph and Matrix Approach

An evaluation procedure for product life-cycle design at the conceptual stage is presented using a digraph and matrix approach. Life-cycle design attributes are identified and used to evaluate a life-cycle design index. The ideal value of this index is also obtained, which is useful in assessing the relative life-cycle design value of product design alternatives. A step-by-step procedure for the evaluation of the life-cycle design index is presented and illustrated by means of two examples.

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DESIGN STAGE IN THE LIFE CYCLE OF AN OPTICAL DEVICE

Interexpo GEO-Siberia ◽

10.33764/2618-981x-2021-6-172-175 ◽

2021 ◽

Vol 6 ◽

pp. 172-175

Author(s):

Alexandr U. Lepen

Keyword(s):

Life Cycle ◽

Creative Process ◽

Product Life Cycle ◽

Optical Devices ◽

Information Support ◽

Design Stage ◽

Software Environment ◽

Specific Knowledge ◽

Product Life ◽

Life Cycle Design

Any product, including optical devices, during its existence goes through a series of states from the idea of creation to disposal, which is called the product life cycle. Design is a complex and creative process of a specialist (designer), invariant to various types and complexity of devices. Designing requires the designer to in addition to special, subject-specific knowledge, as well as knowledge of the methodology, tools and rules for the implementation of project procedures. Modern design of optical devices is carried out in a software environment, the so-called the system of information support of the product life cycle, which makes it necessary for students to master the appropriate software.

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Life Cycle Design and Evaluation at Conceptual Design Stage Using Digraph and Matrix Approach

Volume 1: Advanced Energy Systems, Advanced Materials, Aerospace, Automation and Robotics, Noise Control and Acoustics, and Systems Engineering ◽

10.1115/esda2006-95734 ◽

2006 ◽

Author(s):

M. F. Wani

Keyword(s):

Life Cycle ◽

Conceptual Design ◽

Design Stage ◽

Matrix Approach ◽

System A ◽

Conceptual Design Stage ◽

Life Cycle Design ◽

The Matrix ◽

System Nodes ◽

Digraph And Matrix Approach

In this paper, a procedure based on digraph and matrix approach is presented for carrying out life cycle design and evaluation of mechanical systems, at system conceptual design stage. Features which characterize life cycle aspects of the system are identified and are called attributes of life cycle of a the system. Consideration of these attributes and their interrelations are rudiment in design and evaluation of life cycle of the system. This is modeled in terms of life cycle Design (LCD) attributes digraph for the system. Nodes in the digraph represent attributes and their relations are represented by their edges. The digraph is represented by one-to-one matrix for development of life cycle design (LCD) expression, which is characteristics of the system. A variable life cycle design attributes permanent matrix is defined to develop VPF-d which is also useful in comparing two design concepts of the system. Life cycle design Index (LCD-I) is obtained from permanent of the matrix or from the LCD expression by substituting numerical values of the attributes and their interrelations. A higher value of the index implies good LCD of the system. The ideal value of LCD index (III) is also obtained from the matrix expression, which is useful in assessing the relative LCD, of the system alternatives. The procedure is useful in design and development of LCD of the system. A step by step procedure for evaluation of LCD index is also suggested and is illustrated by means of an example.

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Study on life-cycle design for the post mass production paradigm

Artificial intelligence for engineering design analysis and manufacturing ◽

10.1017/s0890060400142040 ◽

2000 ◽

Vol 14 (2) ◽

pp. 149-161 ◽

Cited By ~ 86

Author(s):

YASUSHI UMEDA ◽

AKIRA NONOMURA ◽

TETSUO TOMIYAMA

Keyword(s):

Life Cycle ◽

Mass Production ◽

Product Life Cycle ◽

Knowledge Bases ◽

Life Cycles ◽

Simulation System ◽

Product Life ◽

Cycle Simulation ◽

Life Cycle Design ◽

Modular Structures

Environmental issues require a new manufacturing paradigm because the current mass production and mass consumption paradigm inevitably cause them. We have already proposed a new manufacturing paradigm called the “Post Mass Production Paradigm (PMPP)” that advocates sustainable production by decoupling economic growth from material and energy consumption. To realize PMPP, appropriate planning of a product life cycle (design of life cycle) is indispensable in addition to the traditional environmental conscious design methodologies. For supporting the design of a life cycle, this paper proposes a life-cycle simulation system that consists of a life-cycle simulator, an optimizer, a model editor, and knowledge bases. The simulation system evaluates product life cycles from an integrated view of environmental consciousness and economic profitability and optimizes the life cycles. A case study with the simulation system illustrates that the environmental impacts can be reduced drastically without decreasing corporate profits by appropriately combining maintenance, reuse and recycling, and by taking into consideration that optimized modular structures differ according to life-cycle options.

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