When the product tree depth is more than 3 levels, the FM-NHE-EE consequences chain may be longer.

See the following example:

You may specify how failures of Component affect Block, then how these effects affect Assembly, then how these effects affect Subsystem, etc. till the End Effect on Aircraft level.

You may also omit some product tree levels and for example specify the effect of Component failures on Block, then jump over some levels and specify directly the influence of block failures to the whole System level. It will reduce a number of work required but will not allow generation of FMECA reports on skipped levels (Assembly, Subsystem in this example).

 

To define NHE for NHE:

1. After the failure mode input, NHE group of fields will become editable:

2. Create the first NHE as described in paragraph To define a single NHE earlier in this chapter. The first NHE ("B" in this example) will appear:

3. To enter the first NHE ("B") consequences and effect on next higher assembly, right-click the NHE description cell ("B") and select "Add NHE" from the popup menu. The second NHE will appear:

4. Edit the NHE description as described in earlier in the To define a single NHE paragraph and change the IDN if required as described in the To select affected assembly paragraph:

For this example, if you wish to omit the "Assembly" level and specify the effect of NHE "B" on "System" level, click the "..." button in the IDN cell of "NHE 2" group and select "System" item from the product tree:

 

7. Proceed with steps 3-4 to enter all the NHE chain.

8. Enter End Effect information for the last NHE, as decribed in Entering FMECA data for Item paragraph.