| # Maintenance policies Corrective Maintenance (CM) policy The maintenance activity that is carried out to repair an item after a defect is identified. The item must be restored to the technical state required for it to fulfill its function properly. This policy is supported by the following modules: Call Management Service Order Control Maintenance Sales Control Work Control System Periodic Maintenance (P) Preventive maintenance that takes place at a constant interval or during certain times of the service period. The maintenance frequency is expressed in a time unit. Counter Value (CV) Preventive maintenance that takes place at a constant interval. This interval is expressed in a usage-related unit, for example, operating hours or kilometers. The actual moment of maintenance is when the norm value of the counter is reached. These actual moments can be predicted. Periodic Maintenance (P) & Counter Value (CV) You can use periodic maintenance and counter value policies in combination. Maintenance is carried out whenever one of both conditions is reached first. Maintenance is carried out at a particular time, unless a specified norm value is reached. Example A car can be serviced under warranty twice when usage is 10,000 km or six months, whichever comes first. Predicted Activities (PA) You can compare this method with Counter Value (CV). The maintenance intervals are based on the predicted progress of the value of a specific measuring quantity (dependant variable) based on measuring data from the past (history data). This method optimizes the intervals of maintenance. The data that is measured during maintenance can be sent to the history data again. As a result, the maintenance prediction is continuously amended to the latest measurements. Inspections (PI) During an inspection, a set of measurements is carried out for a specific item. Maintenance is required when the measured value of the dependent variable of each measurement type does not meet the norm value. Maintenance is carried out depending on the outcome of the inspection. Each measurement can result in a different activity. The inspection intervals can be based on the expected progress of the value of a specific measuring quantity (dependent variable). Preventive Maintenance (PM) policy All maintenance activity that are carried out before the item malfunctions. The aim is to keep the item in the technical condition that is required for correct functioning. This Service Planning & Concepts module supports the policy. Preventive maintenance can be divided into: Use Based Maintenance (UBM) Condition Based Maintenance (CBM) Inspections (PI) During an inspection, a set of measurements is carried out for a specific item. Maintenance is required when the measured value of the dependent variable of each measurement type does not meet the norm value. Maintenance is carried out depending on the outcome of the inspection. Each measurement can result in a different activity. The inspection intervals can be based on the expected progress of the value of a specific measuring quantity (dependent variable). Use Based Maintenance (UBM) Preventive maintenance that takes place after a certain period of use, independently of the condition of the item at that moment. Use Based Maintenance can be subdivided into: Periodic Maintenance (P) Counter Value (CV) Periodic Maintenance (P) & Counter Value (CV) Inspections (PI) During an inspection, a set of measurements is carried out for a specific item. Maintenance is required when the measured value of the dependent variable of each measurement type does not meet the norm value. Maintenance is carried out depending on the outcome of the inspection. Each measurement can result in a different activity. The inspection intervals can be based on the expected progress of the value of a specific measuring quantity (dependent variable). Condition Based Maintenance (CBM) Preventive maintenance that takes place if a required measurement no longer meets the specified norm value. For example, if an engine has oil pressure less than value x, corrective action must be taken. Condition based maintenance can be subdivided into: Predicted Activities (PA) Inspections (PI) Inspections (PI) During an inspection, a set of measurements is carried out for a specific item. Maintenance is required when the measured value of the dependent variable of each measurement type does not meet the norm value. Maintenance is carried out depending on the outcome of the inspection. Each measurement can result in a different activity. The inspection intervals can be based on the expected progress of the value of a specific measuring quantity (dependent variable). Related topics Measurements |