A Two stage approach for hybrid-assembly line design

Download
index.pdf
2014
Şimşek, Doğukan
Show full item record
589
views
128
downloads
The aim of the study is to propose an approach for hybrid assembly line design in the make-to-order and mixed-model environment. In this context, the main goal is to reduce lead-time, which is one of the key concepts of competitive markets. A systematic approach was employed for designing of hybrid assembly line in order to achieve the goal. The line is divided into two parts in a hybrid system: while the first part of the line works as a closed-loop system for instant replenishment of Constant Work in Progress (CONWIP) supermarket, the second part of the line works for order fulfillment that starts the fulfillment by pulling semi-finished products from the CONWIP supermarket. At the first phase, a mathematical model was developed to identify the right station to install the CONWIP supermarket, which has an objective function forcing maximization of horizontal balancing of the line. The output of the model was the input for the second phase. Here, the CONWIP levels were identified for each product type using a simulation-embedded optimization tool, which retrieves the inputs from simulation runs in the simulation model of the proposed system. At the second phase, current serial assembly line and the proposed hybrid assembly line were compared considering optimized CONWIP levels, which were previously collected. The performance measures were set as lead-time, WIP level and throughput level. Comparison of the results revealed that hybrid system provides an opportunity for lead-time reduction at a reasonable WIP level.
Assembly-line methods., Assembly-line balancing., Manufacturing processes., Production engineering.
http://etd.lib.metu.edu.tr/upload/12618286/index.pdf
https://hdl.handle.net/11511/24279
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

A new method to measure vehicle pass-by noise in a finite dimensioned semi-anechoic room
Arslan, Ersen; Çalışkan, Mehmet; Department of Mechanical Engineering (2010)
In this study, a method to predict vehicle pass-by noise in a finite dimensioned, semi-anechoic chamber with chassis dynamometer has been developed. Vehicle noise has been modeled as the summation of the individual contributions regarding the principal noise components, namely, engine including air intake, front tire and rear tire noises. This method employs wave propagation, Doppler shift, and time delay in the estimation of the sound pressure due to each component at points of interest specified by releva...
An adaptive simulated annealing algorithm-based approach for assembly line balancing and a real-life case study
Guden, H.; Meral, Fatma Sedef (2016-05-01)
In this study, we address the deterministic assembly line balancing problem (ALBP) in a multiple product-models environment with multiple objectives. We have been motivated by the assembly line balancing problem of a white goods product production line that is a multi-model type line with 68 stations through which four product-models are assembled, each with approximately 400 precedence relations and 300 tasks. In the plant, to cope with the increasing demand in the medium term, the efficiency of the line i...
An approach to achieve design recommendations for interior elements of urban railway transport with regard to user perception of semantic dimensions
Turhan, Mehmet; Hasdoğan, Mehmet; Department of Industrial Design (2008)
Although, the literature reveals that coach interior designs have been emphasized as an important factor determining their competitiveness in the market and the quality of an interior design can be effectively improved by using information about passenger expectations, few practical studies exist to assess the urban railway transport interiors from the passengers’ perspective. Consequently, designers lack reliable criteria to guide their decisions which would satisfy users. In this study, it is intended to ...
A new approach to neural trip distribution models: NETDIM
Tapkin, Serkan; Akyilmaz, Ozdemir (Informa UK Limited, 2009-01-01)
This paper develops and presents a new neural network approach to model trip distribution, which is one of the important phases of conventional four-step travel demand modelling. The trip distribution problem has been investigated using back-propagation artificial neural networks in a number of studies and it was concluded that back-propagation artificial neural networks underperform when compared to traditional models. Such underperformance is due to the thresholding of the linearly combined inputs by util...
Rebalancing of assembly lines
Sancı, Ece; Azizoğlu, Meral; Department of Industrial Engineering (2015)
In this study, we consider an assembly line rebalancing problem. We assume that there is a disruption on one or more workstations that makes the current solution infeasible. After the disruption, we aim to find a rebalance so as to catch the trade-off between the efficiency measure of cycle time and the stability measure of number of tasks assigned to different workstations in the original and new solutions. We generate all nondominated objective vectors with respect to our efficiency and stability measures...
Citation Formats
D. Şimşek, “A Two stage approach for hybrid-assembly line design,” M.S. - Master of Science, Middle East Technical University, 2014.
METU IIS - Integrated Information Service open@metu.edu.tr