Atb Bus To Design Maintenance Schedule Using Reliability Centered Maintenance Method Case Study
METHODOLOGY
The definition of methodology according to experts from seputarpengetahuan.com are : Rothwell and Kazanas. According to them the method is a method, process or approach to convey information. Bisno Hebert explained, the method is a technique that is generalizable properly in order to be accepted or used in one discipline or field of discipline and practice. Macquarie. Method is a way of doing something, especially something related to a specific plan. Ruslan Rosdy suggested as a method of scientific activities related to understanding the inner workings of a subject and object of research in an effort to find an answer to the scientific basis and validity of something studied.
Methodology from merriam-webster.com is “a set of …show more content…
Calculate the number of failures that occurred in the time interval for the selected APTB PPD bus. Calculate total minimum downtime for the selected APTB PPD bus.
The selected APTB PPD bus, based on previous research that have been published by CRC Press/Balkema (Taylor & Francis Group) for the title “Failures analysis of APTB bus to design maintenance schedule using Reliability Centered Maintenance Method”.
RESULT AND DISCUSSION
The APTB PPD bus operates from 05.00 pm up to 22.00 pm or in other words APTB PPD bus operates for 17 hours (1020 minutes) each day. Currently the maintenance process conducted by Perum PPD is breakdown maintenance or maintenance is performed if there is damage to the machine. The ratio of duration for maintenance in the event of breakdown to the duration of bus operations is Tf. The ratio of duration for maintenance if preventive mantenance carried out on the duration of bus operations is Tp. The duration for replacements of the critical component on APTB PPD bus when breakdown maintenance performed and if preventive maintenance is done are shown in the table …show more content…
The Duration of Replacement of Critical Components
APTB PPD Bus Critical Components Distribution Pattern Time Interval (Minutes) Breakdown Preventive
14 Oil filter Lognormal 10 5
9 Oil filter Weibull 10 5
6 Oil filter Exponential 10 5
15 Oil filter Exponential 10 5
1 Solar filter Weibull 10 5
14 Solar filter Lognormal 10 5
7 Clutch plate Lognormal 120 90
4 Clutch plate Exponential 120 90
Total minimum downtime for each critical components that shown in table 2, it can be seen by the following steps :
Example : oil filter
Distribution type : Weibull distribution
Parameter = 22,974.8 and = 1.36276
Cumulative distribution using equation 10
F(500)=5.4142E-03
By the same calculation method, it will obtain a cumulative distribution function at the time of 1,000 kilometers, 1,500 kilometers, 2,000 kilometers, etc.
The number of failures that occurred in the time interval using equation 6
H(0) = 0
H(500) = {1+H(0)} x F(500)
= {1+0} x 5.4142E-03
= 5.4142E-03
By the same calculation method, it will obtain a number of failure at the time of 1,000 kilometers, 1,500 kilometers, 2,000 kilometers, etc.
Total minimum downtime using equation 5
Tf=10/120 = 0.009804
Tp=5/1020 = 0.004902
=
The definition of methodology according to experts from seputarpengetahuan.com are : Rothwell and Kazanas. According to them the method is a method, process or approach to convey information. Bisno Hebert explained, the method is a technique that is generalizable properly in order to be accepted or used in one discipline or field of discipline and practice. Macquarie. Method is a way of doing something, especially something related to a specific plan. Ruslan Rosdy suggested as a method of scientific activities related to understanding the inner workings of a subject and object of research in an effort to find an answer to the scientific basis and validity of something studied.
Methodology from merriam-webster.com is “a set of …show more content…
Calculate the number of failures that occurred in the time interval for the selected APTB PPD bus. Calculate total minimum downtime for the selected APTB PPD bus.
The selected APTB PPD bus, based on previous research that have been published by CRC Press/Balkema (Taylor & Francis Group) for the title “Failures analysis of APTB bus to design maintenance schedule using Reliability Centered Maintenance Method”.
RESULT AND DISCUSSION
The APTB PPD bus operates from 05.00 pm up to 22.00 pm or in other words APTB PPD bus operates for 17 hours (1020 minutes) each day. Currently the maintenance process conducted by Perum PPD is breakdown maintenance or maintenance is performed if there is damage to the machine. The ratio of duration for maintenance in the event of breakdown to the duration of bus operations is Tf. The ratio of duration for maintenance if preventive mantenance carried out on the duration of bus operations is Tp. The duration for replacements of the critical component on APTB PPD bus when breakdown maintenance performed and if preventive maintenance is done are shown in the table …show more content…
The Duration of Replacement of Critical Components
APTB PPD Bus Critical Components Distribution Pattern Time Interval (Minutes) Breakdown Preventive
14 Oil filter Lognormal 10 5
9 Oil filter Weibull 10 5
6 Oil filter Exponential 10 5
15 Oil filter Exponential 10 5
1 Solar filter Weibull 10 5
14 Solar filter Lognormal 10 5
7 Clutch plate Lognormal 120 90
4 Clutch plate Exponential 120 90
Total minimum downtime for each critical components that shown in table 2, it can be seen by the following steps :
Example : oil filter
Distribution type : Weibull distribution
Parameter = 22,974.8 and = 1.36276
Cumulative distribution using equation 10
F(500)=5.4142E-03
By the same calculation method, it will obtain a cumulative distribution function at the time of 1,000 kilometers, 1,500 kilometers, 2,000 kilometers, etc.
The number of failures that occurred in the time interval using equation 6
H(0) = 0
H(500) = {1+H(0)} x F(500)
= {1+0} x 5.4142E-03
= 5.4142E-03
By the same calculation method, it will obtain a number of failure at the time of 1,000 kilometers, 1,500 kilometers, 2,000 kilometers, etc.
Total minimum downtime using equation 5
Tf=10/120 = 0.009804
Tp=5/1020 = 0.004902
=