1. Ryan McLean John-Michael Mulesa Joe Perrin Zach Schoenberger

2. [Overview] Components most likely to fail Criticality Examples
FMECA Excerpt

3. [Components Most Likely to Fail]
Atmel Atxmega16D4
Our microprocessor
Tied for most complex part on our board
Telit GM862/GPS
Our GSM/GPS unit
Equal in complexity to a microcontroller
Murata Power Supply
Supplies power for PCB

4. [Criticality Examples]
High Criticality
Laser based projector capable of damaging eye
Broken nose from flying unit during car collision
Medium Criticality
Overvoltage on power supply input
Low Criticality
Webserver failed to start, restart required

5. [FMECA Excerpt] Failure No. Failure Mode Possible Causes
Failure Effects
Method of Detection
Criticality
Remarks B1
Input voltage = 0
Voltage spike causes protection diode to fail
UI will not have any data to display
Observation
Medium
Diode failing to a short would cause the fuse to fail, both would need to be replaced B2
Output of power supply < 3.5
A resistor setting the output voltage fails to a short
GSM unit will not function below 3.4V, other peripherals will fail if voltage drops further than that.
Resistor would need to be replaced B3
Output of power supply > 3.5
A resistor setting the output voltage fails to an open
Compass/Microcontroller/Accelerometer could be damaged due to overvolting. Will cause UI to go to fail screen or display incorrect data
Ics might have to be replaced C1
Stop receiving commands from ARM
USB to USART IC failure
UI goes to failure screen
IC would have to be replaced

6. [Summary] Components most likely to fail Criticality Examples
FMECA Excerpt

7. [Questions?]