Failure Mode and effects Analysis
(FMEA) Exam 2 Questions With Verified
Correct Answers!!
example - pump - ✔✔fails on, transfers off, seal leak/rupture, pump casing leak/rupture
example - heat exchanger - ✔✔leak/rupture, tube side to shell side; leak/rupture, shell side
to external environment; tube side, plugged; shell side, plugged; fouling
functional failure modes - ✔✔more abstract than hardware failure modes
1. function fails to perform
2. function performs incorrectly
3. function performed prematurely
4. function provides incorrect or misleading information
5. function does not fail safe
software failure modes - ✔✔- software function fails
- function provides incorrect results
- function occurs prematurely
- unsent messages
- messages sent too early or too late
- faulty message
- software stops or crashes
- software hangs
- software exceeds internal capacity
- software startup failure
- software function has slow response
, design FMEA - ✔✔- analyzes product design before release to production, with a focus
on product function
- analyzes systems and subsystems in early concept and design stages
process FMEA - ✔✔- used to analyze manufacturing and assembly processes after they are
implemented
- aid in the objective evaluation of design requirements and design alternatives
- aid in the initial design for manufacturing and assembly
- increase the probability that potential failure modes have been considered
- provide additional information to aid in the planning of efficient design testing
background information for design FMEA - ✔✔- detail design
- part/component list
- functions of components
- operating conditions
- design specification
- details of operating methods
- critical parameters of design
process FMEA - ✔✔- identify potential product related process failure modes
- assess the potential customer effects of the failures
- identify the potential manufacturing causes on which to focus on
- develop a ranked list of potential failure modes
background task for process FMEA - ✔✔- details of the manufacturing process/process
flow chart
- list of critical process parameters
- properties of device material
- manufacturing environment details
(FMEA) Exam 2 Questions With Verified
Correct Answers!!
example - pump - ✔✔fails on, transfers off, seal leak/rupture, pump casing leak/rupture
example - heat exchanger - ✔✔leak/rupture, tube side to shell side; leak/rupture, shell side
to external environment; tube side, plugged; shell side, plugged; fouling
functional failure modes - ✔✔more abstract than hardware failure modes
1. function fails to perform
2. function performs incorrectly
3. function performed prematurely
4. function provides incorrect or misleading information
5. function does not fail safe
software failure modes - ✔✔- software function fails
- function provides incorrect results
- function occurs prematurely
- unsent messages
- messages sent too early or too late
- faulty message
- software stops or crashes
- software hangs
- software exceeds internal capacity
- software startup failure
- software function has slow response
, design FMEA - ✔✔- analyzes product design before release to production, with a focus
on product function
- analyzes systems and subsystems in early concept and design stages
process FMEA - ✔✔- used to analyze manufacturing and assembly processes after they are
implemented
- aid in the objective evaluation of design requirements and design alternatives
- aid in the initial design for manufacturing and assembly
- increase the probability that potential failure modes have been considered
- provide additional information to aid in the planning of efficient design testing
background information for design FMEA - ✔✔- detail design
- part/component list
- functions of components
- operating conditions
- design specification
- details of operating methods
- critical parameters of design
process FMEA - ✔✔- identify potential product related process failure modes
- assess the potential customer effects of the failures
- identify the potential manufacturing causes on which to focus on
- develop a ranked list of potential failure modes
background task for process FMEA - ✔✔- details of the manufacturing process/process
flow chart
- list of critical process parameters
- properties of device material
- manufacturing environment details
