Optimizing Plant Layout Design and Selection via SLP and AHP: A Case Study of Namwa Community Enterprise, Chiang Rai Province
Main Article Content
Abstract
This research aims to design and select an optimal plant layout for the Namwa Community Enterprise by integrating Systematic Layout Planning (SLP) with the Analytic Hierarchy Process (AHP). The primary focus is to eliminate production wastes and prevent cross-contamination in accordance with Good Manufacturing Practice (GMP) standards. The methodology commenced with a material flow and activity relationship analysis using an Activity Relationship Chart (ARC) to develop three alternative plant layouts. Subsequently, the AHP technique was employed to determine the importance weights of
the eight types of production waste. Expert evaluations indicated that the top three critical factors were:
1) Defects (22.60%), 2) Inventory (21.57%), and 3) Inappropriate Processing (17.49%). The results demonstrated that Layout Alternative 3 was the most suitable option, achieving the lowest weighted waste score of 1.00, compared to 1.30 and 1.48 for Alternatives 1 and 2, respectively. The selected layout completely eliminated both backtracking and cross-contamination risk points, representing a 100% reduction for both indicators. These findings contribute to enhancing production efficiency and
the competitive advantages of agricultural businesses in Chiang Rai province sustainably.
Article Details

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการตีพิมพ์ในวารสารฯ ถือเป็นลิขสิทธิ์ของวารสารฯ หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใดๆ จะได้รับอนุญาต แต่ห้ามนำไปใช้เพื่่อประโยชน์ทางธุรกิจ และห้ามดัดแปลง
References
The Food and Drug Administration. GMP 420 [Internet]. 2023 [cited 2025 Oct 9]. Available from: https://food.fda.moph.go.th/gmp-head/420/.
Saisuwan N, Sumranhun P, Punthanakoraphat N, Tongtrongsub K. and Kuisriku C. Enhancing coconut water production process according to GMP guidelines and evaluating impact by simulation modeling of Ban Klang Khlong Taplang community enterprise, Samut Sakhon province. Journal of Energy and Environment Technology. 2024; 11(1): 9-22.
Jirasirilerd G. and Ponsri N. Application of lean manufacturing system to reduce production time: a case study of Khanom Jeen fermented flour rice noodles factory. Thai Industrial Engineering Network Journal. 2023; 9(1): 21-28.
Jantakard H, Hongthong S, Suja P. and Wichaikham S. Enhancing potential on production place based on good manufacturing practices a case study of the Ban San Phak Khae community enterprise. Proceeding of the 13th Phayao Research Conference; 2024 January 24-26; Phayao, Thailand. 2024. p. 427-440.
Boonmee C, Pichailar K. and Matpan S. Factory layout improvement for wood furniture manufacturing. Thai Industrial Engineering Network Journal. 2022; 8(1): 39-51.
Pawanathamasuk T, Boonrung P. and Saicharoen K. Plant layout design for Thai Barbecue delivery. Thai Industrial Engineering Network Journal. 2022; 8(2): 34-41.
Nachaisit P, Kroeksungnoen K, Nutkhum W, Niithikarnjanatharn J, Camchay A, Kunton P. and Phontang B. Development of factory layout to optimize transportation routes using systematic layout planning. Thai Industrial Engineering Network Journal. 2025; 11(1): 24-33.
Namwat T. and Janapiraganit T. Waste reduction in Lahu handicraft production of community enterprise in Chiang Rai province. MBA-KKU Journal. 2024; 17(1): 76-103.
Wanglisakul K, Jantakard H, Sanguanpang S. and Jaikham N. Analyzing factors influencing the development of railway freight transportation service through the fuzzy analytic hierarchy process technique. Engineering and Technology Horizons. 2024; 41(2): 410203.
Jomtong P. and Pornsing C. The selection of steel product suppliers using analytic hierarchy process: a case study of steel company. The Journal of KMUTNB. 2021; 31(3): 384-394.