Share
نماذج الاستبدال للانظمة القابلة للتصليح وغير القابلة للتصليح باستخدام نظرية التجديد == Replacement models For Repairable and non - Repairable Systems By Using Renewal Theory
Author name:
مروة احسان عبد الله ابو كرده
Supervisor name:
محمد عبود طاهر
General topic:
Administration and Economics
Specific topic:
Statistics
Degree:
Master
University:
University Of Basrah - Faculty Of Administration And Economics
Language:
Arabic
University location:
Basrah
First pages:
07T4646 - p.pdf
Abstract:
Of the issues that concerned knowledge of statistics is the reliability of the machines and equipment due to the high costs incurred by business organizations, so it requires the use of scientific methods in order to determine an optimal plan to replace the lowest possible cost Faculty and less downtime during the life of the machine or device.In this research, the use of one of the statistics tools in stochastic process (replacement), to find the best model the replacement of the device or Equipment idle by the comparison between the proposed models , a preventive replacement model , the planned replacement model and failure replacement model under two criteria : the minimum total cost and minimum downtime, and the researcher have programs to calculate the total cost rate language Matlab R2012a.In this research, the application of water desalination device in solidarity for grinding grain plant because the time between the last time repairs failure represents a random variable and has knowledge of those times, (times) from the mill, and using statistical program easy fit 5.5 professional was to determine the type of distribution followed by the time failures and repairs . through the choice of distribution, which has the lowest value of the corresponding test Goodness of fit.The chapter dealing with the practical side "for the application of Rayleigh distribution for the time of failure and distribution Frechet time to repair the three models mentioned above" the real data for the Failures desalination device.The research found that the best model is the preventive replacement model where age was the best replacement is 6 months so that gives a minimum total cost.
