Query: Warehouse layout optimization

title: Warehouse Layout Optimization A Case Study based on the adaptation of the Multi Layer Allocation Problem
abstract: Warehouses are key points of logistic processes. The design of a warehouse is a complex problem. It includes a series of interrelated decisions among warehouse processes, warehouse resources and warehouse organizations. This article deals with the implementation of the mathematical model for the Products Allocation Problem (PAP) in a multi layer warehouse. The main goal of this work is the identification of the optimal warehouse configuration for a company operating in the sector of production and distribution of sports equipment and sportswear. The final aim of the layout optimization is the minimization of the handling costs and decentralization costs related to the stored products, which on turn depends on the assignment of products to the storage slots. In order to solve the PAP model, a preliminary ABC analysis has been carried out to identify more significant class of products in terms of sales volume and handling movements. The consistency of the obtained solution has been successively evaluated considering the cost saving that could be obtained implementing the new layout configuration. Different scenarios have been analysed and evaluated. Numerical cost results show a good quality solution.

title: Solving the multiple level warehouse layout problem using ant colony optimization
abstract: This paper addresses the multiple level warehouse layout problem, which involves assigning items to cells and levels with the objective of minimizing transportation costs. A monthly demand and an inventory requirement are associated with every item type along with vertical and horizontal unit transportation costs. The warehouse has one port to transport items vertically from ground floor to the other levels, where each item must be assigned to exactly one cell on the assigned level. An ant colony optimization (ACO) algorithm is adapted to this NP complete problem and its performance is evaluated by comparing its solutions to the ones obtained using genetic algorithms (GA) as well as the optimal solutions for small problems. The computational results reflected the superiority of ACO in large size problem instances, with a marginally better performance than GA in smaller ones, while solving the tested instances within a reasonable computational time. Furthermore, ACO was able to attain most of the known optimal solutions for small size problem instances.

title: SEMI DYNAMIC WAREHOUSE LAYOUT OPTIMIZATION OF FAST MOVING RAW MATERIAL WITH MATHEMATICAL APPROACH
abstract: Gudang merupakan tempat penyimpanan yang menjadi tulang punggung sistem logistik. Hingga saat ini, begitu banyak penelitian dengan berbagai metode telah dilakukan untuk mengefisiensikan tata letak dan operasional gudang. Namun demikian, efsiensi yang telah dilakukan hanya berlaku untuk gudang dengan karakteristik yang sama dengan kondisi penelitian. PT. X merupakan salah satu perusahaan manufaktur yang bergerak di bidang consumer goods. Keterbatasan luas gudang dan sistem produksi just in time yang diaplikasikan oleh perusahaan tersebut memaksa penataan raw material di gudang tersebut bersifat semi dinamis dimana penataan beberapa raw material dapat berubah seiring dengan jenis dan kuantitas produk yang diproduksi pada hari itu. Penelitian ini menggunakan model secara matematis dalam dua skenario untuk mendapatkan penataan raw material yang optimal. Skenario pertama memungkinkan tercapainya solusi dengan jarak tempuh material handling yang minimal namun pada beberapa penataan terkesan acak karena adanya jarak beberapa rak yang hampir sama pada baris rak yang berbeda. Pada skenario dua terlihat total jarak sedikit lebih buruk daripada skenario pertama namun dari sisi penataan jauh lebih baik karena material yang sama memiliki letak yang berdekatan.

title: An Empirical Warehouse Layout Design and Optimization Approach for Sri Lankan practitioners
abstract: Warehousing is a vital function for Sri Lanka, due to its trade dependency. One of the most critical areas highlighted for development in Sri Lanka is infrastructure, of which warehouse holds a key bearing. This study will extend the theoretical framework of Warehouse Layout Designing published by Dissanayake and Rupasinghe, 2018 by incorporating viewpoints of the Sri Lankan practitioners. A focus group discussion with 5 prominent experts in the industry will be incorporated and extended questioner feedback from 10 other practitioners. This research focuses on bridging the theoretical gaps with respect to the warehouse design and optimization from the Sri Lankan context to fill the following research gaps. (1) Approach in identifying the practitioners and developing the questionnaire (2) Assess the warehouse designers approaches carried out by the practitioners (3) overall constraints within the industries in Sri Lanka.

title: Special Optimization Process for Warehouse Layout Design
abstract: Warehousing activity is essential for all manufacturing companies (final assemblers and suppliers) of the global supply chains. Warehouses are also key elements of global automotive supply chains because the optimal formation and operation of warehouses play important role in manufacturing companies in order to maintain and increase their competitiveness. Warehousing is one of the most important and cost intensive logistical processes in which the main goal is to reduce costs and improve efficiency. Determination of the ideal warehouse layout is a special optimization process, not a typical mathematical optimization. Therefore, the warehouse layout design has many special characteristics. In the article, the detailed procedure and characteristics of the special optimization process of the warehouse layout design are described. Furthermore, the study also introduces the most commonly used objective functions, their calculation methods, and a large number of design constraints and limitations. The author elaborated a three step method for defining the ideal warehouse layout which is also introduced in the paper. The main added value of the study is, that a detailed procedure of the special optimization process of warehouse layout design was elaborated and described by the author. There is a gap in the existing literature in the research topic of the special optimization process of warehouse layout design because there is not available any article which especially discusses the complex and detailed procedure of the special optimization process in any depth.

title: Research on Warehouse Layout Optimization and Freight Volume Distribution of Steel Enterprises
abstract: According to the previous research results,this paper established the warehouse layout optimization and freight volume distribution model which is based on the minimum cost principle.Also this paper establishes the warehouse layout optimization and freight volume distribution model based on the maximal interaction force.Then a mathematical model is proposed with considering the two aims which contain the minimum cost and the maximal interaction force.After that, this paper sets up the LINGO model to solve this mathematical model.Finally,the analysis results of the example prove that the proposed model has strong effectiveness and high practicality.

title: Adaptation of the multi layer allocation problem for warehouse layout optimization: A case study
abstract: This paper deals with the implementation of the mathematical model for the Products Allocation Problem in a multi layer warehouse. The model has been applied to identify the optimal warehouse configuration for a company operating in the sector of production and distribution of sports equipment and sportswear, with the main goal of minimizing the material handling costs. Cost analysis have been carried out in order to evaluate the cost saving that could be obtained implementing the new layout configuration. Different scenarios have been considered to evaluate the consistency of the obtained solution. Numerical cost results show a good quality solution.

title: Multi objective Optimization of E commerce Logistics Warehouse Layout Based on Genetic Algorithm

title: Improving Warehouse Layout and Allocation Optimization in Catering Services Company
abstract: This study aims to find out and provide suggestions about improving the layout and optimizing product placement allocation for the inventories in the warehouse of a catering services company. The method used in this study is quantitative research methods and the type of research is descriptive research. The data collection method using observations and interviews, and the data characteristic are primary and secondary data. Time Horizon in this study using a cross sectional. Data analysis used ABC Class Based and Linear Programming method with LINGO Software version 18.0. The results of research conducted at PT Aerofood ACS warehouse is product classification using ABC Class Based. The products are divided into three classes, class A namely rice, and monouse, class B are soy sauce sauce, coconut milk, and milk, and class C are tissue, sugar, and tea. For product placement allocation using Transportation method with Linear Programming approach. The results obtained are changes in the space used to store all products. The smaller overall number of pallets and shelves that should visit affects the length of time taken to collect the products. Based on these results, managers should use the ABC Class Based and Transportation methods for optimizing allocations at a catering services company.

title: Research on layout optimization of cold chain warehouse center based on SLP method
abstract: Based on the operation process of cold chain logistics center and the relationship between different businesses, this paper plans the existing storage center reasonably. On the basis of SLP method, the basic elements of logistics objects, logistics flow and logistics operation route are analyzed. Make clear the relationship between logistics operation units and non logistics operation units, use the weighted sum of their comprehensive relations to generate the comprehensive proximity ranking, and determine the area and location of the operation units based on the actual situation and site conditions. Finally, the reasonable layout is obtained by comparing and analyzing with the existing scheme.