Presenting a model to determine effective maintenance policy with a system dynamics approach مقاله

چکیده:

In this research, considering the dynamic nature of systems and machines, an effort has been made to present a model that can consider this feature in the design of the maintenance model. For this purpose, a system dynamics model is presented that considers the most important variables influencing the life cycle, such as system life, mission criticality, access level, improvements in parts and systems, failure rate, etc., in selecting and evaluating the maintenance policy. In fact, we are looking to develop and present a framework that can both evaluate the maintenance policies of the system and simulate the impact of maintenance parameters on the life cycle cost of the system. The criteria used to measure the effectiveness of the maintenance policy used are life cycle cost and cumulative failures. In this research, maintenance modeling has been done using system dynamics knowledge. In fact, the goal of each maintenance model is to create a balance between the costs of failure and lost opportunity with the costs of preventive maintenance, which principle has been used in the proposed model in determining the preventive maintenance policy based on forecasting lost opportunity. The method used is based on predicting future failures using the average cumulative lost opportunities. The presented model specifies the framework for evaluation and decision-making at the three levels of operational management, middle management, and upper levels in order to select an effective maintenance policy.