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Reliability Centered Maintenance (RCM) Analysis
Last revised 01/14/2011
ASENT_RCM.PPT
Introduction
The Reliability Centered Maintenance analysis is integrated
into the FMECA toolkit, which allows you to leverage the
relational nature of the FMECA to provide you with identified
end effects and conditional probabilities for each failure mode
in the system.
In addition ASENT’s FMECA Manager will allow you to
quickly update your analysis assuring that your results are
current any time failure rates are updated or item descriptive
data (name, part number, description, etc) is changed. The
relationship between failure modes and effects and the tree
structure are automatically tracked by the toolkit so that updates
can easily be made at any time.
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Selecting the RCM Analysis Method
The first step is to select the
RCM analysis method. This is
done in the Session Manager,
which is the first ASENT tool
that is invoked. Select the
project you will work on, then
select the RCM method from
the ‘RCM Type’ drop down
box. Click on the Save
button.
Now right click on the project and Select ‘FMECA Manager’ to enter the FMECA.
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Recommended Methodology
1) Run the ‘Check FMECA’ utility and resolve any outstanding problems.
2) From the FMECA Library Editor, enter any predefined Preventive Maintenance Tasks into the RCM Task
Library. All that is needed is the task name.
3) Start at the Assemblies at the bottom of the tree and work toward the top of the tree. The intermediate
assemblies will have many of the same results and tasks as the lower level assemblies.
4) Analyze one failure mode using the questionnaire, based on the results, add PM tasks as appropriate,
and order the tasks as they should be performed, entering the interval for the tasks.
5) Copy the RCM results to any other failure mode where the same results and tasks apply.
6) Add any notes unique to any use of a PM task application on a given failure mode.
7) Generate the RCM reports and review for content and completeness. Depending on your situation, there
might not be a need to generate all 7 reports. Generate the reports on one assembly and refine it to your
satisfaction, then proceed to the next assembly.
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Extensive use of libraries reduces data entry and errors
Data entry and errors are
significantly reduced by the
extensive use of libraries in
the tool.
The Notes/Status field allows
you to enter data, comments
or notes that will apply to all
uses of the task.
The navigation buttons and
their meanings are shown
below.
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Starting the Analysis
To begin the analysis,
select an assembly and
click on the ‘RCM’ Tab.
The first failure mode is
selected by default, and
the RCM results for this
failure mode are
displayed above the
Failure Mode Grid.
Press the ‘Analyze’
button to perform the
analysis for this failure
mode.
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Analyzing Failure Modes
The RCM Questionnaire displays
the System Level effect for the
selected failure mode along with
the severity of the system level
effect.
The first set of questions
categorizes the significance
(structural or functional) the
Failure Mode contributes to the
Assembly.
Click on a check box to answer
the question. The next
appropriate question will be
presented
The ‘Abort’ button exits the
questionnaire and leaves the
results unchanged.
A ‘Back’ button is available after
the first question to allow you to
back up, in case you answered
the previous question incorrectly.
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Completing the RCM Questionnaire
After the questionnaire has
determined the significance, the
set of questions for that type
significance is presented.
The questionnaire will exit when
the last appropriate question has
been answered.
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Displaying & Copying Results
After the
questionnaire is
completed, the results
are displayed in the
Failure Mode grid and
summarized in the
area above the grid.
Click in the RCM
Tasks Grid and add
Tasks.
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Adding PM Tasks
The task drop down
contains all the tasks
entered in the library.
Select the task.
Enter the interval that the
Task should be performed.
The Prelim Int is the interval
when the system is in use.
The Packed Int is when the
system is in storage.
Enter the Maintenance
Level (Where the PM task
will be performed).
Select the task type from
The drop down list.
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Finalizing PM Data
Once the PM tasks are entered, you can
add a description or note that is unique to
this use of the PM Task
By pressing the ‘Edit Task Notes’ button or
‘Add Task Desc’ button.
The red arrows allow you to set the order of the
Tasks as they will appear in the report.
Pressing either of these buttons opens a
panel where you can enter additional
data. (Up to 255 characters)
Copying the RCM data, including PM tasks, can save
you a lot of time and effort where the same result and
tasks apply. Press the Copy RCM button to copy the
data.
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Copying RCM Data
To copy RCM data from one failure mode to one or more other
failure modes, select a failure mode and then click on the ‘Copy
RCM’ button. Next, select the Assembly to receive the data.
The tree of the present function/phase is presented. Expand it
until the assembly of interest is displayed.
After selecting the assembly and pressing
the ‘OK’ button, the failure modes for the
selected assembly are displayed. This is a
multiple select window, with the items in
blue being selected. The standard
Ctrl+Click and Shift+Click selection
methods are available. Press the ’OK’
button when the failure modes you want
are all selected.
The data, including the PM Tasks are
copied to the selected failure modes.
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Generating RCM Reports
The Assy Type field in ASENT gives you control
over which assemblies are included in your RCM
report. Assemblies with a blank assembly type
are automatically excluded from the report.
Selecting RCM Reports from the reports drop
down menu of the Assembly menu displays the
RCM Reports option panel.
Select an Assembly type from the bottom window and check the
reports you want. You can run this report for a single assembly or
an entire subtree by clicking the ‘Include SubAssemblies’ check
box.
The Excel workbook, with a page for each selected report, is
generated.
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