scholarly journals A MODIFIED ANALYTICAL HIERARCHY PROCESS DESIGN EVALUATION METHODS FOR PRODUCT RECOVERY

2021 ◽  
Keyword(s):  
Analytical Hierarchy Process ◽  
Design Guidelines ◽  
Life Cycles ◽  
Product Recovery ◽  
Design Stage ◽  
Design Element ◽  
Design Strategies ◽  
Early Design Stage ◽  
Design Attributes ◽  
Hierarchy Process

The absence of existing standards for product recovery planning and the associated difficulty in prioritising the conflicting design requirements are among the main challenges faced during product design. In this paper, a concept for the Design for Multiple Life-Cycles (DFMLC) is proposed to address this situation. The objective of the DFMLC model is to assist designers in evaluating design attributes of Multiple Life-Cycle Products (MLCP) at the early design stage. The methodology adopted for the evaluation of MLCP design strategies has been based on a modified Analytical Hierarchy Process (AHP). Two mapping matrices of the design guidelines and design strategies concerning MLCP design attributes were developed for the modified AHP model. Disassemblability (> 21 %) was found to be the most important design element for MLCP followed by serviceability (> 20 %) and reassembly (> 12 %).

Reliability-Informed Economic and Energy Evaluation for Design for Remanufacturing: A Case Study on a Hydraulic Manifold

2021 ◽  
Author(s):  
Venkat P. Nemani ◽  
Jinqiang Liu ◽  
Navaid Ahmed ◽  
Adam Cartwright ◽  
Gül E. Kremer ◽  
...  
Keyword(s):  
Life Cycles ◽  
Design Stage ◽  
Design Strategies ◽  
Early Design Stage ◽  
Energy Evaluation ◽  
Design For Remanufacturing ◽  
Design Changes ◽  
Development Evaluation ◽  
Field Reliability

Abstract Design for Remanufacturing (DfRem) is an attractive approach for sustainable product development. Evaluation of DfRem strategies, from both economic and environmental perspectives, at an early design stage can allow the designers to make informed decisions when choosing the best design option. Studying the long-term implications of a particular design scenario requires quantifying the benefits of remanufacturing for multiple life cycles while considering the reliability of the product. In addition to comparing designs on a one-to-one basis, we find that including reliability provides a different insight into comparing design strategies. We present a reliability-informed cost and energy analysis framework that accounts for product reliability for multiple remanufacturing cycles within a certain warranty policy. The variation of reuse rate over successive remanufacturing cycles is formulated using a branched power-law model which provides probabilistic scenarios of reusing or replacing with new units. To demonstrate the utility of this framework, we use the case study of a hydraulic manifold, which is a component of a transmission used in some agricultural equipment, and use real-world field reliability data to quantify the transmission’s reliability. Three design improvement changes are proposed for the manifold and we quantify the costs and energy consumption associated with each of the design changes for multiple remanufacturing cycles.

A Dynamic Analysis Of The Impact Of Air Pollution On The daylight Availability In An Open-plan Office In London

2021 ◽  
pp. 94-103
Author(s):  
Jiangtao Du ◽  
Steve Sharples
Keyword(s):  
Air Pollution ◽  
Urban Areas ◽  
Simulation Analysis ◽  
Design Stage ◽  
Design Strategies ◽  
Early Design Stage ◽  
Pollutant Deposition ◽  
Open Plan ◽  
Building Project ◽  
The Impact

The deposition of air pollutants on glazing can significantly affect the daylight transmittance of building fenestration systems in urban areas. This study presents a simulation analysis of the impact of air pollution and glazing visual transmittance on indoor daylight availability in an open-plan office in London. First, the direct links between glazing visual transmittance and daylighting conditions were developed and assessed. Second, several simple algorithms were established to estimate the loss of daylight availability due to the pollutant deposition at the external surface of vertical glazing. Finally, some conclusions and design strategies to support facade planning at the early design stage of an urban building project were developed.

scholarly journals Analytical Hierarchy Process for Design Selection of Micro Hot-Marking Tool

2014 ◽  
Vol 699 ◽  
pp. 897-902
Author(s):  
Sivarao ◽  
Mohd Fairuz Dimin ◽  
N.M.F. Faris ◽  
A. Hambali ◽  
Sivakumar Dhar Malingam ◽  
...  
Keyword(s):  
Analytical Hierarchy Process ◽  
Selection Process ◽  
Design Concept ◽  
Design Stage ◽  
Cnc Milling ◽  
Concept Selection ◽  
Cnc Milling Machine ◽  
Initial Stage ◽  
Design Selection ◽  
Hierarchy Process

Veracious concept selection process is crucial in design engineering where, a concept with concise description will fulfill customers’ requirements. Failure in concept selection can lead to inaccurate design which will result in unnecessary process repetition of the initial stage. One of the best tools that can be used in determining the best design concept is Analytical Hierarchy Process (AHP). Micro Hot-Marking Tool (HMT) is a super-finished tool with micro tip which is to be used for alphabetical marking process using CNC milling machine. In this research, AHP was successfully employed in selecting design concept for HMT. Four significant and robust concepts were analyzed, namely C1, C2, C3 & C4. Concept 2 (C2) has been chosen as the best concept with the highest score of 27% among all the evaluated concepts which will be taken into next design stage.

Continuous Preference Trend Mining for Optimal Product Design With Multiple Profit Cycles

2013 ◽  
Author(s):  
Jungmok Ma ◽  
Harrison M. Kim
Keyword(s):  
Product Design ◽  
Large Scale ◽  
Life Cycles ◽  
Design Stage ◽  
Early Design Stage ◽  
Data Mining Algorithms ◽  
Optimal Product Design ◽  
Predictive Design ◽  
Purchase Patterns ◽  
Trend Mining

Product and design analytics is emerging as a promising area for the analysis of large-scale data and reflection of the extracted knowledge for the design of optimal system. The Continuous Preference Trend Mining (CPTM) algorithm and a framework that are proposed in this study address some fundamental challenges in the context of product and design analytics. The first contribution is the development of a new predictive trend mining technique that captures a hidden trend of customer purchase patterns from large accumulated transactional data. Different from traditional, static data mining algorithms, the CPTM does not assume the stationarity, and dynamically extract valuable knowledge of customers over time. By generating trend embedded future data, the CPTM algorithm not only shows higher prediction accuracy in comparison with static models, but also provide essential properties that could not be achieved with a previous proposed model: avoiding an over-fitting problem, identifying performance information of constructed model, and allowing a numeric prediction. The second contribution is a predictive design methodology in the early design stage. The framework enables engineering designers to optimize product design over multiple life cycles while reflecting customer preferences and technological obsolescence using the CPTM algorithm. For illustration, the developed framework is applied to an example of tablet PC design in leasing market and the result shows that the selection of optimal design is achieved over multiple life cycles.

scholarly journals Rethinking Performance Gaps: A Regenerative Sustainability Approach to Built Environment Performance Assessment

2018 ◽  
Vol 10 (12) ◽  
pp. 4829 ◽  
Author(s):  
Sylvia Coleman ◽  
Marianne Touchie ◽  
John Robinson ◽  
Terri Peters
Keyword(s):  
Built Environment ◽  
Performance Assessment ◽  
Design Stage ◽  
Building Performance ◽  
Design Strategies ◽  
Actual Performance ◽  
Early Design Stage ◽  
Performance Targets ◽  
Expectations Gap ◽  
Environment Performance

Globally, there are significant challenges to meeting built environment performance targets. The gaps found between the predicted performance of new or retrofit buildings and their actual performance impede an understanding of how to achieve these targets. This paper points to the importance of reliable and informative building performance assessments. We argue that if we are to make progress in achieving our climate goals, we need to reframe built environment performance with a shift to net positive goals, while recognising the equal importance of human and environmental outcomes. This paper presents a simple conceptual framework for built environment performance assessment and identifies three performance gaps: (i) Prediction Gap (e.g., modelled and measured energy, water consumption); (ii) Expectations Gap (e.g., occupant expectations in pre- and post-occupancy evaluations); and, (iii) Outcomes Gap (e.g., thermal comfort measurements and survey results). We question which of measured or experienced performance is the ‘true’ performance of the built environment. We further identify a “Prediction Paradox”, indicating that it may not be possible to achieve more accurate predictions of building performance at the early design stage. Instead, we propose that Performance Gaps be seen as creative resources, used to improve the resilience of design strategies through continuous monitoring.

Use of Analytical Hierarchy Process (AHP) for Selecting The Best Design Concept

2012 ◽  
Author(s):  
Hambali Ariff ◽  
Mohd. Sapuan Salit ◽  
Napsiah Ismail ◽  
Y. Nukman
Keyword(s):  
Product Development ◽  
Conceptual Design ◽  
Analytical Hierarchy Process ◽  
Development Process ◽  
Pairwise Comparison ◽  
Design Concept ◽  
Product Development Process ◽  
Design Stage ◽  
Conceptual Design Stage ◽  
Hierarchy Process

Pemilihan konsep reka bentuk yang sesuai di peringkat reka bentuk gagasan dalam proses pembangunan produk adalah merupakan keputusan yang genting. Keputusan yang tidak tepat boleh menyebabkan sesuatu produk itu perlu direka bentuk semula atau dikilang semula. Salah satu daripada keadah yang boleh digunakan dalam menentukan konsep reka bentuk yang paling sesuai adalah process hierarki beranalitis (AHP). AHP telah digunakan dalam hampir kesemua aplikasi yang berkaitan dengan membuat sesuatu keputusan. Dalam kertas kerja ini, hasil daripada kajian kes menunjukkan bahawa konsep AHP boleh membantu pereka bentuk untuk membuat penilaian secara berkesan daripada pelbagai konsep reka bentuk di peringkat reka bentuk gagasan. Kertas kerja ini memaparkan kaedah pemilihan konsep reka bentuk dengan menggunakan proses hierarki beranalitis. Kata kunci: Process hierarki beranalitis; reka bentuk gagasan; proses pembangunan produk; perbandingan pasangan; pembangunan kerusi roda Selecting the right design concept at conceptual design stage in product development process is a crucial decision. Inaccurate decision can cause the product to be redesigned or remanufactured. One of the useful tools that can be employed in determining the most appropriate design concept is Analytical Hierarchy Process (AHP). AHP has been employed in almost all applications related to decision–making problems. In this paper, the results of a case study illustrates that AHP concept can assist designers to effectively evaluate various conceptual design alternatives at the conceptual design stage. This paper presents the methodology of selecting design concepts using analytical hierarchy process. Key words: Analytical hierarchy process; conceptual design; product development process; pairwise comparison; wheelchair development

Sensing Material Systems - Novel Design Strategies

2012 ◽  
Vol 10 (3) ◽  
pp. 361-375 ◽  
Author(s):  
Sascha Bohnenberger ◽  
Chin Koi Khoo ◽  
Daniel Davis ◽  
Mette Ramsgard Thomsen ◽  
Ayelet Karmon ◽  
...  
Keyword(s):  
Building Materials ◽  
Design Stage ◽  
Design Strategies ◽  
Early Design Stage ◽  
Built Form ◽  
Novel Approach ◽  
Sensing Material ◽  
Material Systems ◽  
New Generation ◽  
External Stimuli

The development of new building materials has decisively influenced the progression of architecture through the link between built form and available material systems. The new generation of engineered materials are no exception. However, to fully utilise these materials in the design process, there is a need for designers to understand how these new materials perform. In this paper we propose a method for sensing and representing the response of materials to external stimuli, at the early design stage, to help the designer establish a material awareness. We present a novel approach for embedding capacitive sensors into material models in order to improve material performance of designs. The method was applied and tested during two workshops, both discussed in this paper. The outcome is a method for anticipating engineered material behaviour.

Sign in / Sign up

Export Citation Format

Share Document