There are three ways in which the frequency of preventive maintenance can be determined.
First, use statistical methods. Second, implement mathematical models. Finally, rely on the experience of the technicians responsible for preparing maintenance plans.
To indicate how often a maintenance task should be performed, there are two options:
The first is to follow set periodicities italy telegram data that indicate the intervals at which tasks must be carried out.
The second is established based on the hours of operation.
Both options are equally valid, and it is possible to follow, for certain tasks, pre-established periodicities, while for other tasks belonging to the same equipment, effective operating hours are followed.
Frequency is not based on criticality or component life. It is based on the established failure development time.
Unless you have good historical data at hand that determine an established fault development period, you should not waste time doing exhaustive studies. You should simply make a reasonable assumption.
Most of the time, it's better to spend time on direct execution.
Maintenance frequency should mathematically be the current value of the failure development period divided by two. However, the real problem is that there is no standard for failure development time. Moreover, most plants do not have a history of this.
For example, if the failure development period is 14 days and more time is needed to plan and schedule corrective maintenance for that failure, then a reasonable inspection frequency would be seven days.
Maintenance frequency example
Basic maintenance frequency for the end user
The following table indicates the recommended frequency for performing the basic maintenance program for the end user according to the operating conditions and criticality of the user's application.