Andrej Lisec

An approach to packaging waste reverse logistics: case of Slovenia

Deriving from insights gained in a concrete empirical quantitative modelling research, the aim of the paper is to present the methodology and results of a Packaging Waste (PW) logistics exploratory study that was conducted in cooperation with a leading southeastern European retail chain company. PW Reverse Logistics (RL) is specific, but an integral part of retail operations and can also represent significant logistics and transportation costs concerns. In our research, we have, with a simulation model, been able to reduce the number of tonne-kilometres for 55% which represents significant cost reduction. The study scope focuses on the RL of industrial PW as the handling object of interest in retail, decoupled from the possible returns flow of non-food items and waste generated on premise by shoppers and employees, classified as non-industrial. It introduces an analytical framework, which has been tested and applied to a real case problem. First Published Online: 25 May 2017

A metaheuristic approach to solving a multiproduct EOQ-based inventory problem with storage space constraints

This paper considers the well-known static time-continuous multiproduct economic order quantity (EOQ) based inventory management problem with the storage space constraints. This problem is modelled as a combinatorial optimization problem in the corresponding dynamic discrete time system control process. In order to solve this problem approximately, we developed two heuristics: a special heuristic based on a local search technique and a metaheuristic procedure based on the variable neighbourhood search principle. The efficiency of two heuristics is preliminary examined and compared on several randomly generated instances with the same number of products.

Proceedings XI. International Conference on Logistics in Agriculture 2017 : 9 November 2017, Novo mesto, Slovenia

11th International Conference of Logistics in Agriculture is a traditional conference in the field of logistics, which is very important in agriculture. The conference is organized by the Municipality of Sevnica, Grm Novo mesto – Centre of Biotechnics and Tourism, University of Maribor, Faculty of Logistics and Landscape Governance College. This year the topic of the conference is Short supply chain in Logistics in Agriculture. Our conference proceedings have several papers on different topics which are especially dealing with the distribution of locally produced food. This is one of the most important things for improving the tourism in the region. A part of this year’s conference is also a Round table on Challenges of plastics in agriculture.

Multi-level postal network for improved efficiency: A case study of Slovenian post

The purpose of this paper is to analyse the possible improvement in logistics solution of the Post of Slovenia through reorganisation of the hierarchy of the postal system with the introduction of regional postal centres and parcel post, based on the improvement of the transportation between the postal units. The hypothesis is that by changing the spatial hierarchy and allowing retention and transhipment of parcels among hubs at different levels, economies of distribution costs can be achieved. With the introduction of regional parcel centres and parcel posts, the current two-level parcel distribution (postal centres and posts) is reorganised into four-levels, with the objective to overcome problems that arise at the postal logistics centres and to reduce transport costs. The function of the postal logistics centre remains the same. The postal logistics centre continually collect, process and dispatch parcels. The only difference is that the trucks collect and deliver parcels to a greater extent from and to the regional parcel centres. Up to now, they have only collected and delivered parcels from and to smaller post offices. The improvement aims to reduce transport costs at parcel distribution that represent more than 10% of the share of distribution costs (between the initial and final post office). The remainder of the costs includes the collection, redirection and delivery of parcels to the addressee. We will prove that despite the relatively small percentage of transport costs, the savings could indeed be great due to parcel separation in the area covered by the Postal Logistics Centre, Ljubljana. The solution to the system at four levels indicates lower transport costs where additional fixed costs for introducing regional parcel centres are included.