Relative Impact of Components on System Reliability

This chart type plots system reliability as a function of component/part failure

rate and MTTR.

It is used to give a visual representative breakdown of how a component/assemblies

or selection of components/assemblies will affect overall system reliability.

[Image: ReliabilityChart.png]

Steps to Generate Reliability Analysis Chart

Step 1: Select the Charts Analysis Icon in the MADE or RAM module.

Step 2: Selecting the 'Reliability Analysis' tab followed by the 'Relative

impact of Components on System Reliability' Chart will prompt additional sections to

appear (Options, Data and Chart).

[Image: failureStatistics.png]

Step 3: For the Options section, the chart title can be edited depending on

the type of analysis. 'FCM' or 'Simulation' are the options available to define the

propagation type.

[Image: OptionsSection.png]

Step 4: A component or subsystem can be chosen as an end effect item. This

determines how much of an impact another selected component or subsystem (see step 6)

will have on this item. Clicking on the 'Edit' button will open a new window for end

effect to be selected. In this case, the Pump Assembly is chosen as the end effect item

in order to understand how the motor and pump components affect the overall system.

[Image: EndEffect.png]

Step 5: The Data section has been further split into 'Component Selection'

and 'End Effect Responses'. For component selection, clicking the 'Edit button' will

open a new window allowing the user to select the components/assemblies. Since this

analysis involves understanding relative impact, at least 2 or more items should be

selected. In this example, the Control Unit, Fuel Tank, Diesel Engine Subsystem and its

constituent components have been selected.

[Image: ComponentSelection.png]

Step 6: The End Effects Responses section is where the flow responses of the

selected end effect item can be nominated depending on the user defined analysis.

Clicking the 'Edit button' will open a new window displaying the flow property of and

response of the end effect item. In this case, high and low flow property responses are

selected for the analysis.

[Image: EndEffectResponses.png]

Step 7: In the Chart section, click 'Generate chart'. During chart generation

an intermediate load screen may appear. Additional buttons provided: maximising chart

view (chart section expands to fill width of chart analysis editor), open in a new

window (generated chart is opened in a new 'view' or 'editor'), and export as an image.

[Image: GenerateChart.png]

The charting editor after system reliability chart is generated is shown below. The

chart shows the breakdown of reliability by item and percentage contribution.

[Image: SysReliabilityEditor.png]