Wyniki wyszukiwania - BazTech

1

Industry Expertise Heuristics for Dimensioning Shelf Space of Rack Storage Location in a Distribution Centre with Zone Picking

Czerniachowska Kateryna, Wichniarek Radosław, Żywicki Krzysztof

Management and Production Engineering Review

|

2023

|

Vol. 14, No. 1

43--60

EN

Appropriate product categorization in distribution centres is important for business success because of the possibility of intuitive product finding by the picker and increased product movement. Both of these factors result in the operational efficiency of the distribution centre. The goal of this paper is to explore a model of shelf space dimensioning of storage location on a rack with vertical and horizontal product categorization in a distribution centre, where the aim is to increase total product movement/profit from all shelves of the rack. This is controlled by a packer who must complete orders by getting the goods from shelves and picking them to the container. In this problem, we develop two heuristics and compare the archived results to the CPLEX solver. The average profit ratios of both heuristics are high and approximately equal to 99%. In 10 cases, optimal solutions have been found by heuristics. The total number of possible solutions to be checked for the largest instance was reduced from 1.33 ·10156 to 1.19 ·107 thanks to the heuristic rules.

2

Constraint Programming for Flexible Flow Shop Scheduling Problem with Repeated Jobs and Repeated Operations

Czerniachowska Kateryna, Wichniarek Radosław, Żywicki Krzysztof

Advances in Science and Technology. Research Journal

|

2023

|

Vol. 17, no 3

280--293

EN

The manufacturing process relies heavily on production scheduling to guarantee effective production schedules, reduce costs and product shortages, and get away from delays, interruptions, and waste products. Scheduling issues have been effectively solved via constraint programming. In this paper, we consider a constraint programming formulation of the flexible flow shop scheduling problem with repeated jobs and operations repetitions. We also implemented seven fast heuristics and compared the results with the constraint programming solution. The results from using the CPLEX solver as a solution tool were satisfactory. Computational experiments demonstrate that using constraint programming can be significantly more advantageous than using heuristics.

3

Heuristics for dimensioning the shelf space on the rack with vertical and horizontal product categorisation in the distribution centre with zone picking

Czerniachowska Kateryna, Wichniarek Radosław, Żywicki Krzysztof

Management and Production Engineering Review

|

2022

|

Vol. 13, No. 2

31--47

EN

Distribution centres are the important elements of modern supply chains. A distribution centre stores and ships products. In this paper, we investigate the model of the dimensioning of shelf space on the rack with vertical and horizontal product categorisation in a distribution centre, where the objective is to maximise the total product movement/profit from all shelves of the rack which is being managed by a packer who needs to complete orders selecting the products from the shelves and picking them to the container. We apply two newly developed heuristics to this problem and compare the results to the optimal solution found by the CPLEX solver. There are 8 steering parameters that allow for reducing the search space implemented in heuristics. Among them are parameters that decrease the number of prod- ucts on the shelves, the category width range for assigning most space for the most profitable products within the category, two versions of steering parameters for the number of generated product allocations, the step parameters for the intensity of solution diversification, and the movement/profit below which the solutions are not generated. The computational results are presented and indicate that higher-quality solutions can be obtained using the new heuristics. In 10 from 15 tests, both heuristics can find optimal solutions without exploring the whole solution space. For the rest test sets, the solutions received by heuristics are not less than 92.58%.

4

A Method to Improve Planning of Product Placement on a Printing Sheet

Czerniachowska Kateryna, Żywicki Krzysztof, Wichniarek Radosław

Management and Production Engineering Review

|

2021

|

Vol. 12, No. 1

119--128

EN

Major manufactures are moving towards a sustainability goal. This paper introduces the results of collaboration with the leading company in the packaging and advertising industry in Germany and Poland. The problem addresses the manufacturing planning problem in terms of minimizing the total cost of production. The challenge was to bring a new production planning method into cardboard manufacturing and paper processing which minimizes waste, improves the return of expenses, and automates daily processes heavily dependent on the production planners’ experience. The authors developed a module that minimizes the total cost, which reduces the overproduction and is used by the company’s manufacturing planning team. The proposed approach incorporates planning allowances rules to compromise the manufacturing requirements and production cost minimization.

5

The methodology of acquisition and statistical analysis of data from the process of drying thin wooden elements

Kujawińska Agnieszka, Rogalewicz Michał, Diering Magdalena, Żywicki Krzysztof, Hoffmann Piotr

Drewno : prace naukowe, doniesienia, komunikaty

|

2020

|

vol. 63, nr 205

43--58

EN

This paper presents an original methodology of acquisition and statistical analysis of data from the process of drying thin wooden items, without interference in the manufacturing schedule or process. The research was aimed at reducing the duration of the lamella drying process in a convectional drying chamber, and minimising non-conformities of dry lamellas. The authors discuss the effective application of convectional drying methods, taking into consideration non-homogeneous wood quality resulting from over- or under-drying caused by uneven or insufficient exposure to the drying agent, long duration of the drying process serving to minimise the internal stress of the material, poor efficiency of the drying process, and relatively high operational costs. Based on the tests performed, a quick drying programme is recommended. To reduce the fraction of non-conforming lamellas, the authors suggest that the arrangement of lamellas in the cage be changed so that all lamellas are protected against unconstrained deformation.