Mean Time To Repair (MTTR) and Mean Time
Between Repair (MTBR) 
Technical name: 0PM_DS02_Q0001
InfoProvider: 0PM_DS02
Use
The system determines the MTTR and MTBR key figures on the basis of the individual history of a technical object. The MTTR key figure represents the arithmetic average of the downtimes for the object concerned. The MTBR key figure, however, represents the times in which the reference object was fully operational.
To generate these key figures, this system draws on all the malfunction reports with breakdowns that were created since the start-up date of the reference object. For technical objects, for which the start-up date is not specified in the master record, the system uses the end date of the first malfunction report where the breakdown indicator was set as the start date for consideration. In this case, the first malfunction report is not taken into account in further calculations.
In addition, the system only evaluates those malfunction reports for which the start and the end of the breakdown are specified. The evaluation using the start time and the length of the breakdown is not supported.
The system uses the amount of breakdowns reported for a technical object to first determine the effective breakdowns. In doing this, it merges two reported breakdowns that overlap in time. The reference time for assigning the MTTR and MTBR key figures to a statistics period is the start of the effective breakdown. In the case of longer breakdowns, this can make it impossible to calculate the key figures for the subsequent periods.
MTTR = Sum of effective downtimes / Total of effective breakdowns
MTTR = Sum of effective time between / Total of effective breakdowns
Free Characteristics
|
Info Object |
Description |
|
0CALDAY |
Calendar day |
|
0CALMONTH |
Calendar year/month |
|
0CALQUARTER |
Calendar year/quarter |
|
0CALWEEK |
Calendar year/week |
|
0CALYEAR |
Calendar year |
|
0EQUIPMENT__0COMP_CODE |
Company code |
|
0EQUIPMENT__0EQUITYPE |
Equipment type |
|
0BRKDWNEFF |
Counters for effective breakdowns on one day |
|
0EQUIPMENT__0COSTCENTER |
Cost center |
|
0EQUIPMENT__0CO_AREA |
Controlling area |
|
0EQUIPMENT__0PLANT |
Plant |
|
0EQUIPMENT__0FUNCT_LOC |
Installation location |
Rows
|
Info Object |
Description of the Info Object (and Restriction or Calculation Formula) |
|
0EQUIPMENT |
Equipment |
|
0FUNCT_LOC |
Functional location |
Columns
|
Info Object |
Description of the Info Object (and Restriction or Calculation Formula) |
|
0DOWN_NO |
Amount of effective breakdowns |
|
0NOTIF_TOT |
Notifications (total) |
Calculated Key Figures
|
Technical Name |
Description of the Key Figure (and Restriction or Calculation Formula) |
|
0PM_DS02_CK001 |
Effective downtime [h] NODIM (Eff. downtime) |
|
0PM_DS02_CK002 |
Effective time between breakdowns [h]; NODIM (Eff. time between breakdowns) |
|
0PM_DS02_CK003 |
MTBR [days]:
calculated key figure in days; |
|
0PM_DS02_CK004 |
MTBR [days]:
calculated key figure in hours; |
|
0PM_DS02_CK005 |
MTBR [days]:
calculated key figure in days; |
|
0PM_DS02_CK006 |
MTBR [days]:
calculated key figure in hours; |