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Sustainable ship loading planning for prefabricated products in the construction industry

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journal contribution
posted on 26.08.2021, 06:51 by W Yi, Robyn PhippsRobyn Phipps, H Wang
This paper focuses on sustainable transportation of prefab products from factories to construction sites by ship. Since the transportation cost for all the prefab products of a construction site is mainly dependent on the number of cargo holds used on ships, a loading plan for prefab products that minimizes the number of holds required is highly desirable. This paper is therefore devoted to the development of an optimal loading plan that decides which prefab products are loaded into each cargo hold and how to pack these prefab products into the holds so that as few holds as possible are used. We formulate the problem as a large-scale integer optimization model whose objective function is to minimize the total number of cargo holds used and whose constraints represent the cargo hold capacity limits. We develop a heuristic to solve the problem and obtain a high-quality solution. We have tested the model and algorithm on a case study that includes 20 prefab products. We find that different cargo holds carry prefab products that have quite different densities. Moreover, the orientations of many prefab products are different from their default orientations. The results demonstrate the applicability of the proposed model and algorithm.

History

Preferred citation

Yi, W., Phipps, R. & Wang, H. (2020). Sustainable ship loading planning for prefabricated products in the construction industry. Sustainability (Switzerland), 12(21), 1-12. https://doi.org/10.3390/su12218905

Journal title

Sustainability (Switzerland)

Volume

12

Issue

21

Publication date

01/11/2020

Pagination

1-12

Publisher

MDPI AG

Publication status

Published

Online publication date

27/10/2020

ISSN

2071-1050

eISSN

2071-1050

Article number

ARTN 8905

Language

en