→ 1. Mil-STD-1629 Piece Part FMEA
2. Mil-STD-1629 Criticality Analysis
3. Automotive FMEA
Concerns with FMEA
|This page explains the Mil-Std-1629, Task
Mil-Std-1629 contains 5 FMEA types, called "tasks": Task 101, 102, 103,
104 and 105.
Mil-Std-1629 (Failure Mode and Effect Analysis) has been developed by US department of defense as a requirement for army material suppliers.
||A unique Identifier of the item.
In most cases, but not necessarily, a number.
||Item / Functional Identification
||The name of the item.
||A function of the item.
There may be more than one function per item (2)
||Failure Modes and Causes
||Potential failure modes of the
function and potential causes.
Note: Most FMEA types offer separate columns for failure modes and causes.
There may be more than one failure mode or cause per function (3), and there may be more than one cause per failure mode.
||Mission Phase / Operational Mode
||The mission phase(s) or
operational mode(s) for which the failure mode applies.
Depending on the nature of the item (aircraft, ground vehicle, submarine, ...), mission phases can be very different.
||The effects of the failure mode
on various levels: Local effect (e.g. on circuit or component level),
next effect (e.g. on PCB, assembly or subsystem level), and end effect
(e.g. on system level).
For small systems, the next effect level may be omitted.
There may be more than one failure effect per failure mode (4).
||Failure Detection Method
||How will failures be detected?
Failures may be detectable by diagnostics routine, or they may be
self-evident. Sometimes, failures may be even undetectable.
||Measures (e.g. by design) in
order to minimize the probability of failure modes, or to minimize
potential consequences of failure modes.
||Qualitative classification of
the severity of the failure mode or its consequences. There are usually
4 or 5 severity levels in military FMEAs, and 10 severity levels in
||A very important column. Put here everything that doesn't fit into the other columns, or which is important for other reasons.|