Search results

The purpose of this paper is to enhance the performance of maintenance in a solar power plant by implementing the proactive maintenance (PaM) strategy, measured by the availability and the total maintenance workload.

The prior maintenance strategy was reviewed, and then the strategy was adjusted to focus on PaM. Failure modes and effects analysis (FMEA) was a tool for analyzing the severity and occurrence of the failure modes and effects. Then, the Why‒Why analysis was used for investigating the root causes of failures. The countermeasures were drawn, and the preventive maintenance (PM) plan was revised and carried out. The total maintenance, the PaM and reactive maintenance workload, was obtained, and then the improvements were determined. The values of availability were also obtained.

Previously, the appeared maintenance strategy was not clearly defined. It seemed to have reactive maintenance coupled with PM; it was checked once a year, and corrective actions were made when something wrong was found. Then the management team observed an increase in the reactive maintenance workload, whereas the values of availability were not consistent and tended to drop. After implementing the new maintenance strategy, PaM, the total maintenance workload decreased 14 percent in one year. The average availability of the solar power plant improved from 0.9943 to 0.9969, and the values of availability had better consistency.

The PaM can be applied to solar power plant without limiting the prior maintenance strategy and the complexity of production or machinery. The solar power plant is a quite simple production, and most machines consist of electrical equipment and electrical circuits. The PaM supports to analyze the failure modes, the consequence of the failure events and failure effects, and to decide what should be done. Importantly, PaM can reduce total maintenance workload while the value of availability is higher and consistent.

This paper states how to successfully implement the PaM for the solar power plant. Previously, the plant did not have a clearly defined maintenance strategy; it was checked once a year, and it was corrected when abnormalities were detected. The PaM strategy provides tools and processes for failures and effects analysis. Although there was a more workload of PM, the total maintenance workload decreased, even in the first year.

The purpose of this paper is to enhance the capability in managing the maintenance of the transportation process from a quarry to a crushing plant, measured by the availability value and the process capability value.

The maintenance management plan consists of plans for three levels of management: strategy, tactical and operational maintenance plans. The Deming cycle is a continuous improvement tool use for controlling and monitoring activities of the plans. There are three Deming cycles according to these plans, the first of which involves the improvement of machine performance and investment evaluation. The second involves the improvement of plans, schedule, and activities of preventive maintenance including autonomous maintenance. The third is for human resource development on maintenance works. Moreover, the feedback of a prior round of each cycle comes early to detect abnormalities that provide better capability in maintenance.

Three Deming cycles can use for enhancing the maintenance management. The parameters are availability (A) of machines and the capability process (Cpk) of the transportation process. The results of this research state that the availability value of machines increases to 80-92 percent while the process capability value increases to 0.56.

The maintenance management, especially strategic plan, tactical plan and operational plan via the Deming cycle, can be implemented in other medium-sized industries with limited technology and personnel. It was found that the implementation of the plans has continued to progress with the Deming cycle.

This paper proposes how to successfully implement the maintenance management for medium-sized industries with limited technology and personnel. The maintenance management of three levels is carried out simultaneously by using the Deming cycle. This work has proven to be successful which can be expressed in the availability and the capability process values.