MTTR and MTBR Calulation

Hi
Can Anyone Explain me how MTTR and MTBR is calculated for following cases.
1.What will be the MTTR and MTBR for the Equipment which is breakdown for the first time.
2 And How to calculate MTTR and MTBR for equipment which got breakdown for more the one time,
3. what are all the thing taken in consideration for calculating the MTTR and MTBR.
4. Can we convert the MTTR and MTBR reports in days which is currently in hours in system.

Hi Sandeep,
Let's first understand the concept.
Suppose an Equipment started operations and worked for 1 year. Suppose this equipment underwent Breakdown for 5 times in this period. like this
1st for 10 hrs
2nd for 3hrs
3rd for 8hrs
4th for 20hrs
5th for 17hrs
MTTR = (10 + 12 + 8 + 20 + 5) / 5    = 11Hrs
MTTR is nothing but the average Repair period.
Now what is MTBR?
Think about the intervals between these Breakdowns.
Interval between 1st and 2nd Breakdown - 80 days (1920 hrs.)
                         2nd and 3rd    --               30days (720 hrs)
                         3rd and 4th     --              180 days (4320 hrs)
                         4th and 5th     --                20 days (480 hrs)
MTBR = ( 1920 + 720 + 180 + 20 ) / 4   = 3720 hrs
Now let's come to you queries
1. Obviously MTTR for the 1st breakdown will be equal to the Downtime of the first breakdown.
    MTBR not applicable because there is only one breakdown.
   Even MTTR is nor applicable for this very reason.
2 & 3 I think these have been answered in detail.
For Calculations of MTBR, the Startup date in Equipment Master is taken as reference date. If this field is blank, then the Malfunction Start Date of your 1st Breakdown Notification will be taken as reference date.
4. For this you need to go for a simple development.
Jogeswara Rao K

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No MTTR and MTBR in Table S070 for Query

Dear All,
I tried to create a Query using Table S070 to modify the Breakdown report a little.But i am unable to find the MTTR and MTBR fields as below in the Query for to select in the list.So How to get those fields or Which table i have to use for to obtain those fields??
Regards
M.Manojkumar

You are getting the total TTR and TBR values from the S070 LIS. When you divide these figures by the number of breakdowns (field SMSAUS) of then the result is MTTR and MTBR
For formulae see this picture:
Here One failure is one Downtime. Add all these downtimes and divided by no. of downtimes for MTTR.
And Operating Time (between failures) is the Uptime. Add all Uptimes and divide by no. of Uptimes for MTBR.
Jogeswara Rao K

MTTR and MTBR (Breakdown analysis report mci7) in PM.

Hi all,
this is regarding pm issue.
in mci7(ie MTTR and MTBR report) iam unable to get the required results for certain equipments.
ie it is showing very high values.
please guide me in this regard.
Regards,
santosh.

Dear Maheswaran,
as per your post iam sending the following information.
1. What is the start up date?
Start up date for Equipment 1&2 : 1-4-2006
Start up date for Equipment 3 : 30-11-2004
2 Go to IW29, give the input for Breakdown notification type & get the list of notifications. From that, give the number of notifications created, breakdown duration for each notification (Check for Breakdown check box in those notifications & give that particular number)
In IW29 i found following
NOCO Status 6 nos
OSNO status 1 no
NOPR status 6 nos
Breakdown duration is as follows
NOCO--1.42h
NOCO--0.13h
NOCO-- 1h
NOPR-- 2h
NOCO-- 0.81h
NOPR-- 0.82h
NOCO-- 0.87h
NOCO-- 1.05h
3) in mci7 i used to give date as 09.2010 to 07.2011
4) in mci7 i used to give date and equipment no as input.
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Regards,
santosh.

MTTR and MTBR

CAN ANY ONE TELL ME HOW TO CALCULATE MTBR
my update status is 26,
start up date of equip= 01.08.2011
1st break d d = 10.08.2011
break hours = 10 hours
2nd break d d= 20.08.2011
breakd hours = 5 hours
when i execute ME17 result is MTTR=7.5, MTBR =229
problem is that 229 this is a value of system but when i manually calculate the MTBR result is completely different
PLEASE TELL ME IN BRIEF HOW I CALCULATE SO THAT I CAN GET RIGHT VALUE MANUALLY (BY MY HAND)

MTTR and MTBR
MTTR= Mean time to repair
MTBR= Mean time between repair
Example = Compressor
Start-up date of compressor = 01.08.2011
1st Breakdown = 10.08.2011
Break down Duration = 10 hours
Time =   08:00:00 to 18:00:00
2nd Breakdown = 20.08.2011
Breakdown Duration = 5 hours
Time = 12:00:00 to 17:00:00
MTTR=   sum of total breakdown hours                                                                                .                   Total no. of breakdowns
MTTR = (10+5)/2 = 7.5
MTBR = (Total Running Hours Till Last Breakdown - (N-1) Breakdown duration) / N                                                .                             .                                                                                (N means total no. of Break down)
Total Running Hours = (Notification Start date - Equipment Start date)*24
                                                                            +
                                            (Remaining hours till last breakdown not start)
VERY Important: in this example the last breakdown is on 20.08.2011 and breakdown start at 12:00:00 ou2019clock at noon time, I mean to say the hours between the 00:00:00 to 12:00:00, before breakdown start is 12 hours . this 12 hours or hours before the breakdown start , many people forget to add this in Total Running Hours.
Total Running Hours = (20.08.2011 - 01.08.2011)*24 + 12 hours (hours between the 00:00:00 to 12:00:00, before breakdown start)
                                     = (20-01)*24 + 12
                                     = (19*24) + 12
                                     = 468 hours
MTBR =   468 - 10 ( N-1 means leave last breakdown, sum of duration of all remains breakdown) / 2                               .
MTBR = 229 hours
Pankaj Yadav

Plant Maintenance Business Content - MTTR and MTBR

Greetings to all,
Was wondering whether anyone has any idea which standard (international?) SAP is following, when developing formulas to calculate MTBR (Mean Time Between Repair) and MTTR (Mean Time To Repair) in the Plant Maintenance Business Contents.
It will be great help, if there is an indication on this!
Thks!

Hi,
Yes, I have seen those notes. But was wondering whether there's a specific international standard that was followed.
Thks!
Rgds

MTTR and MTBR Reports

Dear SAPIENTS,
Can anybody let me know about this report generation settings?
What settings are required to get this report?
Regards,
Kaushal Rai

hi
you haven't replied to my queries,ie have you run the breakdown statistics using T code MCI7.
Also kindly refer [Plant Maintenance Information System |http://help.sap.com/saphelp_46c/helpdata/en/8c/fd586fa94711d1890a0000e8322f70/content.htm]
Path for OMOS IMG>Logistics - General>Logistics Information System (LIS)>Logistics Data Warehouse>Updating>Updating Control>Activate Update
regards
thyagarajan

What Are the Index Values of the MTTR and MTBF of the MA5600?

What Are the Index Values of the MTTR and MTBF of the MA5600?

The networking environments are different and the device uses different boards. Therefore, the reference value of the MTBF of the MA5600 is 55 years and the reference value of the MTTR of the Field Replaceable Unit (FRU) is two hours. The preceding values
are only for reference. For details, contact the related Huawei engineers.
http://www.huanetwork.com/smartax-ma5600-series-price_c43

MTTR , MTBR, break down analysis reports

Hello ,
I am new to PM module. I want to understand basic concept of MTTR and MTBR and the SAP config. required to get the above metioned reports in SAP.
It will be a great help if some one can elaborate steps required in config. and prerequisites to fetch the reports from the scratch.
Related links, documents will also be a great help for me.
Thanks

Hi AR1,
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:
u2022 Downtime entered/Time To Repair
u2022 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:
u2022 Time between Repair
u2022 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)
Hope it may help to you
Regards
Srinivas

MTTR MTBR Report on Assembly Level

Dear All
Standard MCJB report give the MTTR and MTBR report on Equipment Level. we need it on Assembly level. for that we did changes on LIS. we create the new Info Structure by coping S070 and added Assembly.
with this Assembly is now coming in the report but the Time is not getting Update. Please help me on this..
Regards
Ankit..

Hello
First You need to create the notification for assemblies then you can see the MTTR & MTBR Time in report.
Can you explain that ,your creating any Notification for Assemblies if so please check the weather that notification in Completed status
Regards,
Rakesh
Edited by: RAKESH ASHOK MANE on Jul 29, 2010 4:39 PM

MTTR / MTBR Calculation

Dear All,
I just want to confirm one thing that mttr/mtbr is calculated from breakdown notification from Breakdown Duration. But now if we are also updating Malfunctioning start and end time in other notification types (Because we need to know time occured in other maintenance also) but NOT doing tick on breakdown.
Hope it will not make any impact on mttr and mtbr reports.
plz share.
thanks
DM

hi
Unless you mark the Breakdown in notification ,it will not consider for MTTR/MTBF calculation
regards
thyagarajan

ZReport for MTTR & MTBR calculation monthwise?

Dear Expert,
We are exploring a way to show the MTTR and MTBR through Z reports for the particular period say for the month of June where the Value of MTTR is coming out correctly but the MTBR is showing from the date of Go live , can there be a field from where I can select from date wise, I check in table S070 with EQUNR. Put SEQTBR/SMSAUS data in this field but value is not what I want.
I need some tips from this community to solve this dilemma...
Regards
Sanjay Sahani

Hi Sanjay,
Can you explain your MTTR / MTBR defination.
As you wrote it is for specific duration it means that there should be some diffrent time zones for same z reports.
Please ealborate on requirement.
Ramesh re

SWAP Equipment using IE4N, without serial number and material, it is possible?

Hi PM Experts, I´ve been reading about the way to SWAP equipments from his functional location without using serial number and material, I think if it is not possible, but to be honest, I cannot find any logical answer for it, since equipment number is unique for a plant. Does anyone have found any work around for it?.
I don’t want to use serial numbers and materials, because I think the process is really simple, since the client does not want to implement the refurbishment process. If there is a break down, here is what I do:
Case 1:
Dismantle damage equipment (Say PM01 Order Type)
Install new equipment (same PM order)
TECO the actual PM order
...Later
Case 2:
Create a new PM orden (say PM01 Order Type)
Repair the break equipment
TECO this new PM Order
Here are the inconsistencies:
What happen with the MTTR and MTBR reports?
In case one, I´ll create the material as equipment, while I´m installing, starting date for his master data is the installation day, and the MTTR and MTBR will start to run. This is ok.
What happened in case 2?, I need to stop the “clock” for the MTTR and MTBR of the dismantle equipment.
This is the reason why, I would like to use IE4N, but since there are no serial number and material, I cannot.
Can anyone please suggest a workaround for this scenario?.
I´m thinking in use INAC (Object Deactivated) system status, can this status help me?, Does this status “stops” the clock for MTTR and MTBR report?. If I change the status to ACT, I´ll get the clock back running?.
How about dismantle the equipment?, It will get the AVLB Available status, but the problem is, this equipment will be “floating” in the whole PM structure and I do not want it. I want to have it in a specific Functional Location but with this status, is this possible?. I woul like to use IE4N to SWAP UTs and later change the status to AVLB Available status, with and exits.
I thinking in an Equipment Status and a “Z” MTTR and MTBR report, based on this status. But to be honest, I´d like a standard solution for it.

For find my iPhone to work, the device has to be powered on and it has to be connected to a network (Cellular or WiFi). Find My iPhone uses your AppleID as the account to search for. Maybe the "guys" you were talking to were referring to a 3rd party application that essentially lo-jacks your device. But even then, it would still require Power and a network.
I don't believe that there is currently a way to flag a specific serial number for location.
Best of Luck.

MTBR: Mean Time Between Repair

Hi dudes,
I have a problem about MTBR logic in SAP.
the system calculates available days between repair times for each equipment, then multiple it by 24 (as every day is 24 hours).
why 24?
we have different work centers with different capacities, some have 1 shift, some 2 and some 3, but system always consider 24 hour for each day and dont pay attention to operating time of that equipment. (and also in a 3 shift work center, the operating time is aound 22 hours a day because of break time not 24)
thank you in advance

Hi,
The issue raised by you is standard . The same problem occurs while calculation of breakdown hrs also if workcenters have some 2 shifts .. here SAP considers 24hrs as base for calculation , you need to look for some modification such that work centershift hrs are taken into consideration while calculation of breakdown hrs in notificaiton and you can better have some zreport again for calculation of MTTR and MTBR taking the workcenter shift hrs into consideration ..
regards
pushpa

What happens if TECO and Business complete steps not processed

HI
If I am not doing TECO and Business complete transactions after Order confirmation, what will be its effect ?
Plz help.
Regards

Technical completion records the time at which malfunction has finished and it contributes to records MTTR and MTBR.Secondly it clears all your reservations for which goods are not issued yet and mark purchase requisitions for deletion which are not converted to purchase orders. Moreover you can't maintain the rework ratio for work orders.
Business completion is financial completion of work orders.On business completion,no more costs can be posted on the specific work order account and moreover the man-hours consumed during maintenance work order are transferred to HR module.
Regards,
Tehsin

Basis in computing for breakdown duration

Hi All,
Good afternoon. I would just like to ask as to what is the basis in computing the breakdown duration generated upon completing a breakdown report? Is it standard that it is computed based on 24hrs a day? If it is, is there a way to change it from 24 hrs to 8 hrs per day? Hope you could help me all. Thank you.
Thanks and regards,
Happy

Hello,
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
Reagrds,
Rakesh

MTTR and MTBR Calulation

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