How to calculate Key Figure - Number of actual machine breakdowns

[Lokesh_Rajak]

I need to understand how SAP calculates Key Figure "Number of actual machine breakdowns (MCI7; MCJC; MCJB)" .

I understand this key figure considers "Time Overlaps" between breakdowns & is being used for calculation of "MTBR"

The other key figure that records exact nos of breakdowns is "Number of machine breakdowns reported (MCI4)"

Please share your thought on following queries:

1. A. BD1 : MF Start 09.00Hrs / MF End 12.00Hrs

BD2 : MF Start 09.30 Hrs / MF End 10.30 Hrs

Number of machine breakdowns reported = 2

Number of actual machine breakdowns (or effective breakdowns) = ?

Breakdown duration: ?

1. B. BD1 : MF Start 09.00Hrs / MF End 12.00Hrs

BD2 : MF Start 11.00 Hrs / MF End 14.00 Hrs

Number of machine breakdowns reported = 2

Number of actual machine breakdowns (or effective breakdowns)= ?

Breakdown duration: ?

1. C. BD1 : MF Start 09.00Hrs / MF End 12.00Hrs

BD2 : MF Start 12.30 Hrs / MF End 15.30 Hrs

Number of machine breakdowns reported = 2

Number of actual machine breakdowns (or effective breakdowns) = ?

Breakdown duration: ?

1. D. BD1 : MF Start 09.00Hrs / MF End 12.00Hrs

BD2 : MF Start 12.00 Hrs / MF End 15.00 Hrs

Number of machine breakdowns reported = 2

Number of actual machine breakdowns (or effective breakdowns)= ?

Breakdown duration: ?

Please also let me know if any direct transaction is available for "MTBF"

[prashant_pandey2 · Accepted solution]

Hello Lokesh,

Looking at above examples, it seems you are searching for overlapping scenarios.

Please note that if there are overlaps, system will consider effective breakdown as one. Also, in such cases breakdown duration will be earliest malfunction start to latest malfunction finish. Hope you will calculate the duration for above 4 scenarios.

Thanks,

Prashant

[jogeswararao_kavala · Accepted solution]

Such overlaps can be well understood from the discussion in the last link provided in my post above.

[prashant_pandey2 · Accepted solution]

yes sir.. they are really helpful for complete understanding.

[psr2412]

Hi Lokesh, Can you update on my earlier response. Regards, PS R

[psr2412]

Hi Lokesh,

MCJB is for MTTR / MTBF (MTBR)------ Equipment,

MCJC is for MTTR / MTBF (MTBR)------ Functional locations.

Follwoing are some of the useful links on MTTR /MTBF

http://www.ptsdcs.com/wpp/APC/APC%20-%20Mean%20Time%20Between%20Failure%20Explanation%20and%20Standa...

The following document was posted by J. R.KAVALA sir and well explained on MTTR / MTBF. This will help you.

Regards,

PS R

[jogeswararao_kavala]

Hello Lokesh

Probability for experts do the exercises given by you and reply would be less, due to obvious reasons. Instead you can ask for the concepts and you yourself calculate facts. Following are useful links to know about all the doubts you have.

• MTTR / MTBR / Breakdown Analysis Information System| SCN
• Equipment Availability - Concepts and Issues | SCN
• MTTR, MTBR, Failure Rate, Availability and Reliability| SCN
• Color indication in MCJB Report | SCN

Regards

KJogeswaraRao