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Draft model of delivery routes at a city logistics scale when applying the Clarke-Wright method

Stopka Ondrej

Archiwum Motoryzacji

2020

Vol. 87, nr 1

67--80

The manuscript deals with the subject of determining the optimal delivery routes in terms of supplying urban distribution centers when minimizing the distance traveled in a particular region for the purpose of addressing city logistics issues using the specific Operations Research method, namely the Clarke-Wright method. Thus, the main paper objective is to examine the issue: what are the optimal transport journeys from the specific object among individual customers in a certain region in order to execute minimum transport performance? First two sections of the manuscript specify the relevant concepts regarding the issue of distribution tasks and vehicle routing problem, and presents data and methods in relation to this research study. The most significant part of the article models the individual routes to determine the optimal interconnections of urban distribution center and their supply from one logistics service center in a regional logistics network at a city logistics scale when applying the Clarke-Wright method. The last sections of the elaborated research study evaluate the major findings and discuss the possible future initiatives in the topic addressed.

Design of placing the container reloading station by applying the Operations Research methods: a research study

Stopka Ondrej

Archiwum Motoryzacji

2019

Vol. 85, nr 3

123--136

The manuscript is focused on the design of methodical procedure to locate container reloading station of national importance in the examined country. Slovakia represents the investigated country where ten container reloading stations , specialized above all in transshipment of loading units, are currently in operation. The introductory parts of the manuscript outline the most important concepts associated with the very term of intermodal transport, container reloading stations in the given country as well as a brief literature review in a given context. The following parts discuss the specification of relevant data and methods for this study as well as a description of the general procedure of multi-criteria evaluation of alternatives; namely consisting of, identifying a set of alternatives (Slovak regions), establishing a set of criteria and determining the weights of such criteria. The last part of the manuscript addresses forming a criteria matrix and subsequent calculations in order to search for the most suitable region when applying particular techniques of Operations Research. Specifically, the weights of criteria being determined based on the Saaty quantitative pairwise comparison method, and the final procedure in the context of selecting the most suitable alternative is suggested by using the Technique for Order Preference by Similarity to Ideal Solution (also called as the TOPSIS method).