Gökçen et al. (2006) have proposed several procedures and a mathematical model on single-model (product) assembly line balancing (ALB) problem with parallel lines. In parallel ALB problem, the goal is to balance more than one assembly line together. In this paper, a network model for parallel ALB problem has been proposed and illustrated on a numerical example. This model is a new approach for parallel ALB and it provides a different point of view for interested researchers.
Being a decision-making process, software evaluation and selection is complicated, time-consuming, costly and also critical to the success of the project/work/organization. In this study, evaluation and selection of customized software which are used to identify the physical effect (explosion, fire and toxic emission) distances for industrial establishments containing, using or storing hazardous chemicals has been considered. These software are called the “Hazard Analysis and Consequence Modeling” (HACM) software in the literature. This study first prepared Likert scale-based questionnaires which were distributed to Environmental Health and Safety (EHS) professionals to obtain their opinions. Likert scale was used with Analytic Hierarchy Process (AHP) method in the processing of data obtained from questionnaires in order to get over the inconsistency problem of pairwise comparison matrices. The Likert scale-based AHP method was used to determine the weights of the criteria, and Preference Ranking Organization METHod for Enrichment Evaluations (PROMETHEE) method was used to obtain the final ranking. PROMETHEE method was preferred for having the opportunity of evaluating the binary “Yes–No” questions in the solution process. Finally, application results were given to illustrate the proposed method by using the PROMETHEE software “Visual PROMETHEE 1.4.0.0”.
Hava taşımacılığı talebindeki değişim ve hava ulaşımına olan talebin yıldan yıla büyük artışlar göstermesi, havalimanının artan talebi karşılamada zorlanması havalimanı sistemini daha da karmaşık hale getirmektedir. Bu nedenle; havalimanlarının yerleşimi, kapasitesi ve beklenen büyüme gibi konularının değerlendirilmesi bir zorunluluk haline gelmiştir. Bu çalışmada Ankara ilinde mevcut durumda sivil hava trafiğine hizmet veren Esenboğa Havalimanının yanı sıra ikinci bir havalimanı potansiyeli değerlendirilmektedir. Sosyo-ekonomik göstergelerle birlikte, mekânsal planlama, ulaştırma gelişimi, çevresel koruma ve finansal sürdürülebilirlik gibi kriterler havalimanı gelişiminde öne çıkmaktadır. Literatür taraması ve uzmanlarla yapılan görüşmeler sonrasında kriterler uzman anketleri ile belirlenmiş ve ağırlıklandırılmıştır. Anketlerden elde edilen verilere dayanarak çok kriterli karar verme tekniklerinden (ÇKKV) AHP, TOPSIS ve ELECTRE kullanılarak hangi trafik seviyesine kadar Ankara ilinin hava ulaşım talebini mevcut havalimanı ile karşılayabileceği değerlendirilmiştir.
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