Shaiful Bakhtiar RodzmanSumayyah HasbullahNormaly Kamal IsmailNurazzah Abd RahmanZulhilmi Mohamed NorAhmad Yunus Mohd Noor2024-05-272024-05-27202026/1/20211823-6782https://oarep.usim.edu.my/handle/123456789/3717ASM Sc. J., 13, Special Issue 3, 2020 for CIIDT2018, 100-108The ranking function is a predictive algorithm that is used to establish a simple ordering of documents according to its relevance. This step is critical because the results’ quality of an IR System is fundamentally dependent on the ranking. This paper aims to develop the Fuzzy Logic Controller of Mamdani-type Fuzzy Inference System to define the ranking function, based on the Malay Information retrieval’s BM25 Model. The logic controller also includes Fabricated and Shia Malay Translated Hadith as the negative ranking indicator to demote the negative document to the bottom of the ranking retrieval results. The results then are evaluated by referring to the relevant documents issued by the Hadith experts and compared with the results produced by the BM25 model original score and the Vector Space Model. Based on the experiment’s result and evaluation, the proposed system has slightly outperformed the BM25 original score and the Vector Space Model (VM) on 11 queries, while the BM25 original score and Vector Space Model only yield a better result in five and eight queries respectively on the P@10, %no measures and MAP. Hence, proven the proposed system has a potential for further research to be conducted on these domains. Keywords: fuzzy logic; Malay text corpus; Malay translated hadith; fabricated and Shia hadith; BM25 negative ranking indicatorenfuzzy logic;Malay text corpus;Malay translated hadith;fabricated and Shia hadith;BM25 negative ranking indicatorArticle100108133