A study of a two-phase inspection policy for a preparedness system with a defective state and heterogeneous lifetime

摘要: This paper considers an inspection policy for a single component protection or preparedness system, in which the arises from heterogeneous population. At any point time, system may be one of three states, good, defective failed. The is only required emergency, and order to ensure high availability on-demand, undergoes sequence inspections. Inspection determines state, so that if transition good state occurs between inspections it not revealed until subsequent inspection. When defect failure revealed, replaced. final We suppose either weak strong, time has distribution mixture. In these circumstances, efficacy two-phase policy, with anticipated frequency early life low later life, considered using cost criteria. investigated context valve natural gas supply network. If lifetime distributions mixture are quite distinct, then savings 5% can achieved by place simpler phase policy. Furthermore, mean small very does tend mimic burn-in