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Former Member

MCJB report

Dear Sap gurus ,

Whether anybody let me know about the <b>Boulded</b> figures, Here I am not able to understand from where 60048.10 ( time between repairs came ),MTBR (15012.03) , these huge hours came . That is why Iam sending the copy below with BOULDED

Equipment Description of technical object

Mean Time To Repair (H) Time Between Repairs (H) Mean Time Between Repairs (H)

Period Breakdowns Downtime (H) MTTR (H) MTBR (H)


5.98 <b>60,048.10</b> <b>15,012.03</b>

08.2007 3 16.00 5.33 <b>19,617.22 </b>

10.2007 1 7.90 7.90 <b>1,196.43 </b>

  • BM01ACSA09

4 23.90

Thank you


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2 Answers

  • Posted on Oct 10, 2007 at 03:52 AM

    hi maheshwer

    the key figure for breakdown will be calculated as follows

    Key Figures for Breakdown Statistics

    By using the breakdown statistics you can analyze the causes of a particular breakdown more closely. The focus in this case is on the distribution of duration of the various breakdowns or repairs, and on how these were caused. The aim of these analyses is to find out the cause behind a short or long breakdown period, or the period between two consecutive breakdowns. An indicator in the first screen of the notification indicates that a malfunction report or a maintenance request contains a machine breakdown.

    Key Figures for Machine Breakdowns

    We distinguish between the following:

    Number of machine breakdowns reported

    Number of actual machine breakdowns

    The reported breakdowns are important from a business point of view, whereas the actual breakdowns are of interest from a technical viewpoint.

    There are three cases which are important for the breakdown analysis. These are represented in the following diagram, which displays two reported breakdowns in each case.

    Three Cases for Breakdown Analysis

    Key Figures for Downtime

    The key figures for downtime comprise the following figures:

    Downtime entered/Time To Repair

    Mean Time to Repair

    The average duration of a machine breakdown, MTTR (Mean Time To Repair), is calculated from the individual history of a piece of equipment. This gives the following formula:

    The key figure MTTR is calculated in hours.

    First breakdown 10 hours

    Second breakdown 05 hours

    Number of breakdowns 02

    MTTR = 10 + 5 / 2 = 7.5 hours

    To calculate the key figure Mean Time To Repair, in the breakdown analysis (information structure S070) the effective breakdowns and the number of effective breakdowns are taken into account. In all other analyses (and the underlying information structures) the noted breakdown duration and the number of noted breakdowns are taken into account.

    Key Figures for Duration Between Machine Breakdowns

    The key figures for the duration between machine breakdowns comprise the following ratios:

    Time between Repair

    Mean Time between Repair

    The average duration between two machine breakdowns, MTBR for short (Average Time between Repair), is calculated from the individual history of the equipment. This gives the following formula:

    The key figure MTBR is calculated in hours.

    The following example shows how the MTBR is calculated:

    Acquisition date of pump A 01.01.94

    First breakdown 10.01.94

    Downtime 10 hours

    Second breakdown 20.01.94

    Downtime 5 hours

    Number of breakdowns 2

    MTBR = (19 * 24 - 10) / 2 or X + Y (hr) / 2

    = (456 - 10) / 2 or (216 + 240 - 10) / 2

    = 223 hours

    Example: Average Duration Between Two Machine Breakdowns (MTBR)

    When calculating the key figure Mean Time between Repair, only the start-up date can be taken into account if the indicator Start-up was set in the master data for equipment or functional locations. If the indicator was not set then the end date of the first malfunction message will be taken into account. In this case, the first malfunction message will not be used when calculating the key figure MTBR (refer to the following illustration).

    iam not able to paste the diagram, kindly look in the link below and select the <b>information system->plant maintenance information system->how the key figures are calulated->key figure for breakdown statistics</b>>

    check whether you have given start up date in euipment master record ,or else the breakdown calculation will be calculated from go live period



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  • author's profile photo Former Member
    Former Member
    Posted on Dec 03, 2007 at 02:47 PM

    Thanks U Thagarajan



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