Int. J Sup. Chain. Mgt Vol. 8, No.5, October 2019 168 Comparative Analysis of Multiple Criteria Decision Making (MCDM) Approach in Warehouse Location Selection of Agricultural Products in Thailand Martusorn Khaengkhan 1 , Chattrarat Hotrawisaya 2 , Bhuk Kiranantawat 3 , Mohd Rizaimy Shaharudin *4 1-3 College of Logistics and Supply Chain Management, Suan Sunandha Rajabhat University, Thailand *4 Faculty of Business & Management, Universiti Teknologi MARA, 08400 Merbok, Kedah, Malaysia 1 martusorn.kh@ssru.ac.th 2 chattrarat.ho@ssru.ac.th 3 bhuk.ki@ssru.ac.th *4 rizaimy@uitm.edu.my Abstract - The objective of this study was to select the suitable warehouse location, which is the focus for business organisations that buy, produce, and store the agricultural products of grass flowers, by using the Multiple Criteria Decision Making theory (MCDM). Three methods were used, which were the Simple Additive Weighting (SAW), Analytic Hierarchy Process (AHP), and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). Seven main factors that influence the selection of an agricultural product warehouse were explored - the size of the area, land price, labour cost, utilities, the quantity of raw materials in the area, ease of access to the place, and distance from the source of the raw materials to the location. Five areas for the warehouse Chiang Rai province, Thailand were compared to ascertain the suitability of warehouse location by using these factors. The results show that Pa Sang Sub-district, Mae Chan District (E) was the most suitable for the agricultural product warehouse. This study can be further applied to decision making in agricultural businesses. Keywords - Decision Making, Location Selection, SAW, TOPSIS, AHP 1. Introduction Currently, to operate a successful business, one of the most important business activities is product distribution. Product distribution is considered an important activity in the management of supply chains, which can help increase product value, and competitiveness in the market [1]. The warehouse maintains the balance between the demand from customers and the number of products available. The demand rate from customers is often unstable and there are also many other factors involved. In business operations, uncertain and unstable demand from customers will cause an imbalance from time to time. However, if products are stored at the right time, and in the right quantity and location, the demand from customers will be met continuously. Every business, whether in agricultural or industrial products, is considered important to the economy of every country. Warehousing is an important activity in business which can help the business to become successful. Grass flowers are the main raw material for the production of grass brooms. Grass flowers only bloom once a year according to the season. The time in which grass flowers can be harvested is from November to March only, causing the price of the grass flowers to highly fluctuate. The price of grass flowers is low during the season due to the large amount of harvest. However, the price is higher after the end of the season. As manufacturers need grass flowers to produce brooms all year round, it causes suppliers to buy grass flowers as much as possible in order to have enough grass flowers to meet manufacturers’ needs throughout the year. Therefore, suppliers need to find a suitable location for the establishment of a grass storage warehouse. In this research, the area in the Chiang Rai province, which is in the northern region of Thailand, was studied because it is a province that produces a lot of grass flowers. There are many suppliers of grass flowers who need a guideline for selecting a suitable location for the establishment of a grass storage warehouse which will help with logistics activity costs. This study explored the selection of the location for businesses of grass flowers, which are used in the ______________________________________________________________ International Journal of Supply Chain Management IJSCM, ISSN: 2050-7399 (Online), 2051-3771 (Print) Copyright © ExcelingTech Pub, UK (http://excelingtech.co.uk/)