RAM Commander User Manual

To create functional blocks

To create functional blocks

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To create functional blocks

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1.Select an assembly.

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2.Right-click on the assembly and choose Edit from the pop-up menu.
3.From the Item Data dialog box, choose to the FMECA tab. The Functional Blocks table is displayed.

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4.Right-click on the table header and choose the Add functional block option from the pop-up menu.
5.In the Item Function dialog box, enter a name and a description of the function.
6. Click OK.

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7.Repeat steps 3 - 5 to enter all the required functional blocks.
8.To group components by functional blocks, click on the corresponding check boxes which are the intersection of the specific component and functional block (FB):

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Each component may be attached to more than one functional block.

Failure rates of all components are distributed equally to all functions to which this component belongs (according to the selection). If component does not belong to any function, its failure rate is distributed equally to all functions. You need to perform the recalculation of a product tree to see failure rates of all functions.

In addition to default function failure rate calculation described above, there are two additional options for function FR calculation - the selection of desired option is performed by "Functional block FR source" selection on Item Data screen:

The available options are:

•Underlying components - proportional FR ratios: default option, illustrated above. Component FR is distributed equally to selected functions it belongs to.
•Underlying components - custom FR ratios: Component FR is distributed to functions according to specified ratio. Total ratio for each component should be equal to 1. Option allows to specify for example that FR of some component is distributed to functions as 0.3*FR for the first function and 0.7*FR for the second function.
•Current item - custom FR ratios: Used when the item under analysis has functions but does not have underlying components. So the FR of the item itself is distributed to functions with specified ratios.

 

9.Click OK to store the data.