PT X serves as a bamboo supplier for the Semarang – Demak toll road project. The bamboo provided must meet specific standards and offer competitive pricing for cost efficiency. To meet these criteria, PT X engages three bamboo suppliers: supplier A, supplier B, and supplier C, each with unique strengths and weaknesses. However, frequent returns of bamboo during implementation have caused significant delays in the project. Thus, finding the most suitable supplier is crucial to meet the bamboo requirements promptly. This research employs five different methods to determine the most suitable supplier based on their individual characteristics. The methods used are the Analytic Hierarchy Process (AHP), Analytic Network Process (ANP), Composite Performance Index (CPI), PROMETHEE, and Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). PROMETHEE and TOPSIS methods integrate with AHP and ANP to derive decision outcomes. Data for the research includes interview results and questionnaire responses from PT X decision-makers. From these interviews, five criteria and twelve sub criteria are identified for the bamboo supplier selection process. The collected data undergoes processing using each method, followed by a ranking process to determine PT Xs most suitable supplier. Comparisons of the results obtained from each method offer insights into user preferences. In AHP, ANP, AHP-TOPSIS, and ANP-TOPSIS methods, supplier B is ranked first. However, in the AHP PROMETHEE I and ANP-PROMETHEE I methods, supplier A takes the top position. Conversely, the CPI method ranks supplier C as the primary supplier. Considering the supplier ranking results, supplier B emerges as the primary bamboo supplier for PT X.

AHP

ANP

CPI

PROMETHEE

TOPSIS

SUPPLIER SELECTION