| Title |
On-site Inventory Management Plan for Construction Materials Considering Activity Float Time and Size of a Stock Yard |
| Authors |
김용환(Kim, Yong Hwan) ; 윤형석(Yoon, Hyeong Seok) ; 이재희(Lee, Jae Hee) ; 강인석(Kang, Leen Seok) |
| DOI |
https://doi.org/10.12652/Ksce.2023.43.1.0079 |
| Keywords |
자재관리; 유전알고리즘; 자재 운반비; 여유시간 Material management; Genetic algorithm; Material transportation cost; Activity float time |
| Abstract |
The inventory of many materials requires a large storage space, and the longer the storage period, the higher the potential maintenance cost. When materials are stored on a construction site, there are also concerns about safety due to the reduction of room for movement and working. On the other hand, construction sites that do not store materials have insufficient inventory, making it difficult to respond to demands such assudden design changes. Ordering materials is then subject to delays and extra costs. Although securing an appropriate amount of inventory isimportant, in many cases, material management on a construction site depends on the experience of the site manager, so a reasonable materialinventory management plan that reflects the construction conditions of a site is required. This study proposes an economical materialmanagement method by reflecting variables such as the status of the preceding and following activities, site size, material delivery cost, timingof an order, and quantity of orders. To this end, we set the appropriate inventory amount while adjusting related activities in the activity network,using float time for each activity, the size of the yard, and the order quantity as the main variables, and applied a genetic algorithm to this processto suggest the optimal order timing and order quantity. The material delivery cost derived from the results is set as a fitness index and theefficiency of inventory management was verified through a case application. |