Buying equipment is mainly to buy it. Mainly three:
The first is the craft, the second is reliability, and the third is maintainability. It is also necessary to combine the three, to ensure the reliability and maintainability under the premise of satisfying the process.
First, equipment reliability
    Definition of reliability: Under the specified conditions, the performance of the specified tasks is completed within the specified time. The so-called reliability is not unlimited, unprincipled reliability, and has a time constraint.
There are two types of reliability:
Inherent reliability: refers to the guarantee that the purchased equipment is designed and manufactured, that is, the reliability obtained from the selection of materials, size design, processing technology and assembly quality, which is guaranteed by the design and manufacturing unit.
Reliability of use: The conditions of use are different and the reliability is different.
Second, equipment maintainability
Definition of equipment maintainability: The efficiency of maintenance personnel for maintenance and repair work.
Maintenance is maintenance and repair. Maintenance is daily maintenance, inspection, adjustment, etc. Repairs are made to troubleshoot and restore equipment performance.
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