Research Article
Joint Economic Design of CUSUM Control Chart and Age-Based Imperfect Preventive Maintenance Policy
| Nomenclature | ā |
| | The age of the machine for maintenance | | The number of age-based maintenances | | Sample size | | The jth sampling interval in the kth phase | | The decision interval coefficient of CUSUM chart | | The reference value coefficient of CUSUM chart | | Probability of type I error | | Probability of type II error | | Average time of an PM | | Average time of a replacement | | Fixed cost of each sampling | | Average variable cost per unit | | Average cost of a compensatory maintenance | | Average cost of a CM | | Average cost of a PM | | Average cost of a replacement | | The expected quality control cost in the cycle | | The expected PM cost in the cycle | | The expected cycle time | | The expected quality control cost in the kth phase | | The expected PM cost in the kth phase | | The expected phase time of the kth phase | | The expected cost per unit time in the cycle |
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