• Over-time and over-level replacement policies with random working cycles 

      Zhao, Xufeng; Nakagawa, Toshio ( Springer New York LLC , 2016 , Article)
      When a unit is running successive works with cycle times, it would be uneconomical or impractical to do maintenances during any working cycle. This paper firstly reviews two replacement models proposed in literatures as ...
    • What is Middle Maintenance Policy? 

      Zhao, Xufeng; Al?Khalifa, Khalifa N.; Hamouda, Abdel Magid; Nakagawa, Toshio ( John Wiley and Sons Ltd , 2016 , Article)
      The main purpose of this paper is to propose several new maintenance policies that can be performed at suitable middle times for trivariate preventive maintenance scenarios. Firstly, characteristics and limitations for the ...