Research On Optimum Economic Production Quantities Strategies Based On Imperfect Preventive Maintenance And Its Application

With the growing scale of modern production and equipments increasingly complex,sophisticated and multi-functional resulting in equipments maintenance costs grow year on year,manufacturing systems for the production equipment maintenance operations and manufacturing cost of producing a significant impact,becoming one of the key factors that determine economic efficiency and market competitiveness.The use of modern equipment production system brought a series of technical,economic,new management problems,get rid of the limitations of traditional equipment maintenance and management.To research and development of new equipment maintenance strategy,maintenance mode and service management have great significance to modern manufacturing companies.Preventive maintenance of production equipment as reducing the number of equipment failures,control business costs,protect important means of orderly production and its importance in an increasingly competitive market environment,become more and more prominent.And the way of imperfect preventive repair is increasingly recognized and applied for business,it abandoned the traditional way of relying on service experience and qualitative judgment based maintenance mode,the integrated application of service modeling and optimization technology,focusing on the maintenance work carried out quantitative description and analysis,to better guide the equipment maintenance business practice.Moreover,given the state of economic production quantities device development will have a significant impact,it is necessary to introduce preventive maintenance model of economic production batch,appropriate maintenance methods in production process,so that the long-term average cost to develop a minimum of economic production batch and preventive maintenance strategy.This article take a stand-alone production equipment and production process for the study,the equipment and equipment maintenance are combined,from the perspective of business users to think about how to develop the best preventive maintenance strategies that the average cost to a minimum.First,the device failure rate Weibull distribution,product defect rate under power function subject to the conditions of distribution,the introduction of the equivalent of military age to describe the back-off factor for preventive maintenance to improve equipment performance,and gradually decreasing the preventive maintenance considering the effect;then,according to equipment maintenance time and equipment operation,designed with reliability-based preventive maintenance preventive maintenance strategies based on fixed cycle strategy.Again,study the economic impact of preventive maintenance equipment production lot,considering the product inventory costs,defective maintenance costs,equipment failure maintenance costs,equipment preventive maintenance costs,the establishment of a model of equipment maintenance and total cost of production;Finally,the lowest cost per unit of product as the goal,with the ??? optimal number of preventive maintenance and economic decision-making to solve the production batch,make a comparative analysis of two strategies and ultimately get the best preventive maintenance strategy with examples to obtain the optimal maintenance strategy was validated.Through this study we found that,after the device has completed the production of a batch of economic situation for the next complete preventive maintenance,business users do not complete preventative maintenance resulting in the economic cycle of production volume is lower than the unit cost of the product is not incomplete implementation of preventive maintenance costs.In addition,two of this article will compare the preventive strategies can be found,based on the reliability of economic production batch cycle president preventive maintenance policy in economic production batch cycle based preventive maintenance strategy fixed period,but the former's low unit costs with the latter.This conclusion can guide business users to develop more reasonable equipment preventive maintenance strategy,although this increase equipment maintenance costs,but it can effectively reduce the number of equipment failures and reduce the quality of products,thereby it can reduce the overall production costs of enterprise.