## 2 The Process Plant Inspection and Maintenance System
### Classification of Current Plant Maintenance Strategies  
The criticality of operational efficiency and reliability cannot be overstated in the realm of processing plants encompassing domains such as petrochemicals and refineries. Maintaining the functionality of these plants is a pivotal challenge due to their role as economic pillars and strategic reservoirs. Researchers have delved into diverse facets of this landscape, exploring maintenance strategies, equipment optimization, and the intricate dynamics of operations [20]. A pivotal aspect of plant management is the maintenance strategy that is employed. [PERSON] et al. [21] conducted a comprehensive study using fuzzy decision-making trial evaluation and laboratory (DEMATEL), dissecting various maintenance strategies. They identified corrective maintenance (CM), synonymous with breakdown maintenance, as an approach to address equipment failures. In contrast, preventive maintenance (PM) has emerged as a cornerstone strategy aimed at forestalling equipment malfunctions and forming a cornerstone of enhancement in maintenance endeavors [22; 23]. The total productive maintenance (TPM) strategy has garnered considerable attention within this spectrum. It extends beyond equipment to encompass assets and personnel, thus portraying the evolution of PM [24]. TPM's core thrust lies in waste reduction, in alignment with the insights of [PERSON] et al. and [PERSON] et al. [25; 26], [PERSON] [27] explored the fusion of TPM and total quality management (TQM), and [PERSON] et al. [28] highlighted TPM's role in achieving world-class manufacturing objectives. In the realm of strategy frameworks, reliability-centered maintenance (RCM) is a tried-and-true plan analysis approach. It establishes equipment requirements aligned with design and inherent reliability factors [29]. Risk-based maintenance (RBM) and condition-based maintenance (CBM) strategies are nested within the RCM [30]. CBM based on real-time condition monitoring has emerged as a linchpin approach for averting breakdown and preserving equipment integrity [31; 32]. \begin{table}
\begin{tabular}{l p{284.5 pt}} \hline \hline  & **TAM** \\ \hline RCM & Integration: TAM employs Reliability-centered maintenance (RCM) principles during turnarounds to optimize maintenance strategies. RCM identifies essential assets and failure modes, which subsequently impact the planning and execution of TAM tasks. \\  & Strategic Use: Condition-based maintenance (CBM) is implemented at TAM to evaluate the current status of critical assets in real time. The information derived from CBM is utilized to make informed decisions and perform maintenance actions that are precisely targeted. \\  & Efficiency Goals: Total productive maintenance (TPM) principles are applied within TPM to maximize equipment efficiency during production. Turnarounds allow the implementation of TPM strategies, contributing to overall plant productivity. \\  & Scheduled Tasks: Preventive maintenance (PM) tasks are scheduled during TAM to prevent potential failures. The integration ensures that planned maintenance is executed efficiently, minimizing disruptions during production. \\  & Unplanned Maintenance: While TAM primarily focuses on planned maintenance, Corrective maintenance (CM) is included to address unforeseen issues discovered during the turnaround. CM tasks are executed efficiently to minimize downtime. Predictive Insights: Predictive maintenance (PdM) techniques are employed within TAM to predict potential issues before they become critical. Predictive insights guide the planning of maintenance tasks, which optimizes resource allocation. \\  & Risk Assessment: Risk-based maintenance (RBM) principles are crucial in TAM for prioritizing maintenance tasks based on risk assessments. Identifying high-risk components ensures that resources are allocated to address critical areas during turnarounds. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Description of maintenance strategies applied in TAM.