## 5 Discussion and Limitations  
The key interpretations of this work rely on highlighting the significance of monumental trees, especially monumental olive trees, discussing the challenges in evaluating these trees and proposing an intelligent decision making system that is implemented in an application that can run both on PC and mobile mode. By integrating scientific, cultural, and technological perspectives, the study provides a sustainable and accessible methodology to ensure these ancient natural landmarks are protected for future generations. Indeed, monumental trees are heritage assets, valued not only for their age and size but also for their cultural and ecological importance [1; 19]. Ecologically, these ancient giants play a crucial role in their ecosystems. They provide habitat and shelter for numerous species, from birds to insects to fungi, contributing to biodiversity. Their large trunk also supports complex microhabitats that nurture diverse life forms. From a cultural perspective, monumental trees often hold deep historical and symbolic value. They can be landmarks, with some dating back thousands of years, serving as living witnesses to history. Many cultures around the world revere these trees for their spiritual or religious significance, considering them sacred or imbued with special powers. As a result, these trees contribute to biodiversity, landscape aesthetics, and local economies, making them valuable resources for sustainable tourism and environmental education. Various scientific methods (increment core sampling, radiocarbon dating, and luminescence dating) have been used to determine tree age, but they require expertise and specialized equipment, limiting accessibility. Research studies have been conducted to estimate the value of  
Figure 3: Comparison report. monumental trees [4; 6] but are mainly for other kinds of trees. For example, the analysis of [PERSON] et al. [6] focuses on the frequency and variability of tree-related microhabitats considering different types of protection and monumental trees. Other existing methods rely heavily on physical measurements (trunk size, rings, etc. ), which may be inaccurate due to the cavitations and distortions in olive tree trunks (e.g., [17]) and there is no unified system for assessing monumental status or value, making it difficult for policymakers, landowners, and conservationists to make informed decisions. Our study is quite different as it focuses on the evaluation of monumental trees using MCDM analysis and the stakeholder can perform evaluations of trees online using a simple application. Indeed, following [PERSON] et al. 's [4] study, a two-step evaluation and classification method concerns the scientific community, considering both tangible and intangible aspects, providing us with a complete understanding not just of individual monumental olive trees but also entire groves. The article presents the design and implementation of a system that combines different multi-criteria decision-making theories for estimating the value of monumental trees whose age is not already known. The use of MCDM allows for the consideration of multiple criteria simultaneously, such as historical significance, ecological impact, and cultural and heritage value. This ensures a holistic assessment rather than focusing on a single aspect. Furthermore, establishing standardized criteria for heritage or monumental tree status ensures consistent evaluations. The structured approach of MCDM provides transparency in decision-making processes and the use of these theories is rather important in evaluating the value of monumental olive trees. We used AHP, SAW, and VIKOR. AHP provides a well-established procedure for weight calculation. The method is based on pairwise comparisons, which is a procedure that helps capture experts' judgment. The main advantage of this theory is that it can be easily combined with MCDM methods, such as SAW and VIKOR.