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 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;NODIM (Eff. time between breakdowns / Amount of effective breakdowns * 24)

0PM_DS02_CK004

MTBR [days]: calculated key figure in hours;NODIM (Eff. time between breakdowns / Amount of effective breakdowns)

0PM_DS02_CK005

MTBR [days]: calculated key figure in days;NODIM (Eff. downtime / Amount of effective breakdowns * 24)

0PM_DS02_CK006

MTBR [days]: calculated key figure in hours;NODIM (Eff. downtime / Amount of effective breakdowns)