A Classification Model of Dimensional Stones Using AHP and Fuzzy Logic

Dimensional stones classification models are efficient to particular aspects of these stones production. However, there are two main problems with these models. Initially, these models focus on specific types of dimensional stones, lacking a comprehensive model encompassing all stone types. Additionally, these systems classify stones based on a singular or limited set of features that affect stone quality. In addition, stones usage is an important factor, which determines the type of stone properties need to be considered in stone quality evaluation. To address these issues, this paper introduces a comprehensive classification model for dimensional stones. This model enables the identification of the optimal stone application and helps prevent the inappropriate use of stones in various contexts. To achieve this objective, an index called Stone Quality Point (SQP) is established, which is utilized within the classification model. Coefficients of the model are calculated by the Analytic Hierarchy Process (AHP) technique, and the Variables of the model are determined based on Fuzzy Logic. Stones are then categorized into three classes (good, moderate, and weak) using the SQP index, taking into account their suitability for various construction applications. Ultimately, the SQP is calculated to categorize the granite used in the construction of building facades. The values range from 1 to 2 for the weak group, 2 to 2.5 for the moderate group, and 2.5 to 3 for the good group. The SQP model and its scoring procedure remain consistent for various types of stones.