Ski rack dfma

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[[Ski rack]]
[[Ski rack]]
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{|class="wikitable" style="text-align:center; width:80%;"
+
{|style="text-align:center; width:80%;"
|-
|-
-
! Assembly
+
! scope="col" | Assembly
-
! Function
+
! scope="col" | Function
-
! Potential Mode of Failure
+
! scope="col" | Potential Mode of Failure
-
! Potential Effect of Failure
+
! scope="col" | Potential Effect of Failure
-
! Sev
+
! scope="col" | Sev
-
! Potential Cause of Failure
+
! scope="col" | Potential Cause of Failure
-
! Occurance
+
! scope="col" | Occurance
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! Detection Controls
+
! scope="col" | Detection Controls
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! Detection
+
! scope="col" | Detection
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! RPN
+
! scope="col" | RPN
|-
|-
| Bracket
| Bracket
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| Latch
| Latch
| Open and Close the Ski Rack on Request
| Open and Close the Ski Rack on Request
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| Not Fully Closed
+
| User Forgets to Close
-
| Chance of Opening leading to loss of skis, potentially fatal accidents
+
| Loss of skis, potentially fatal accidents
 +
| 9
 +
| Distracted User
 +
| 4
 +
| Warning System
 +
| 6
 +
| 216
 +
|-
 +
| Latch
 +
| Open and Close the Ski Rack on Request
 +
| User Forgets to Close
 +
| Loss of skis, potentially fatal accidents
 +
| 9
 +
| Cannot See Open Rack
 +
| 2
 +
| Visual Aide
 +
| 7
 +
| 126
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Does not hold the skis with sufficient force
 +
| Loss of skis, potentially fatal accidents
 +
| 9
 +
| Different height of skis
 +
| 5
 +
| Individually sliced rubber
 +
| 1
 +
| 45
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Does not hold the skis with sufficient force
 +
| Loss of skis, potentially fatal accidents
 +
| 9
 +
| Bent Crossbars
 +
| 2
 +
| Material Choice
 +
| 1
 +
| 18
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Does not hold the skis with sufficient force
 +
| Loss of skis, potentially fatal accidents
 +
| 9
 +
| Unevenly worn rubber
 +
| 3
 +
| Individually sliced rubber
 +
| 1
 +
| 27
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Holds the skis too tightly
 +
| Damage to skis
 +
| 6
 +
| Too thick of a ski
 +
| 4
 +
| More space between crossbars, taller rubber
 +
| 1
 +
| 24
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Holds the skis too tightly
 +
| Damage to skis
 +
| 6
 +
| Bent Crossbars
 +
| 2
 +
| Material Choice
 +
| 1
 +
| 12
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Holds the skis too tightly
 +
| Damage to skis
 +
| 6
 +
| Rubber too hard
 +
| 3
 +
| Material Choice
 +
| 3
 +
| 54
 +
|-
 +
| Crossbars
 +
| Holds the Skis Securely in Place
 +
| Does not apply uniform pressure
 +
| Loss of skis, potentially fatal accidents
| 9
| 9
|  
|  

Revision as of 14:17, 4 February 2011

Ski Rack DFMA

Ski rack

Assembly Function Potential Mode of Failure Potential Effect of Failure Sev Potential Cause of Failure Occurance Detection Controls Detection RPN
Bracket Hold the rack onto the crossbars Plastic Cracks Rack Unstable 5 Cold 2 Material Choice 1 10
Bracket Hold the rack onto the crossbars Plastic Cracks Rack Unstable 5 Poor Manufacturing 4 N/A 6 120
Bracket Hold the rack onto the crossbars Plastic Cracks Rack Unstable 5 Vehicle Crash 4 N/A 10 200
Bracket Hold the rack onto the crossbars Plastic Cracks Rack Unstable 5 Overtorque 4 Allen Key Size 7 140
Bracket Hold the rack onto the crossbars Bolt Shears Rack Unstable 5 Vehicle Crash 4 N/A 10 200
Bracket Hold the rack onto the crossbars Bolt Shears Rack Unstable 5 Rust 7 Use Stainless Steel 5 175
Bracket Hold the rack onto the crossbars Bolt Shears Rack Unstable 5 User Bolt - Not Factory 3 Specific Shape and Thread 10 150
Bracket Hold the rack onto the crossbars Bolt Shears Rack Unstable 5 Overtorque 4 Allen Key Size 7 140
Bracket Hold the rack onto the crossbars Bolt Shears Rack Unstable 5 Undertorque 3 Allen Key Size 7 105
Bracket Hold the rack onto the crossbars Mounting Grooves Wear Rack Unstable 5 Vibrations 3 Material Choice 5 75
Latch Open and Close the Ski Rack on Request Will Not Open Cannot go skiing 7 Frozen 5 Material Choice 8 280
Latch Open and Close the Ski Rack on Request Will Not Open Cannot go skiing 7 Deformation 6 Material Choice 8 280
Latch Open and Close the Ski Rack on Request Will Not Open Cannot go skiing 7 Lost / Broken Key 4 Extra Key 1 28
Latch Open and Close the Ski Rack on Request Will Not Open Cannot go skiing 7 Broken Rivet 2 Material Thickness 6 84
Latch Open and Close the Ski Rack on Request Will Not Close Cannot go skiing 7 Broken Latch 5 Material Choice 2 70
Latch Open and Close the Ski Rack on Request Will Not Close Cannot go skiing 7 Deformation 6 Material Choice 4 168
Latch Open and Close the Ski Rack on Request Will Not Close Cannot go skiing 7 Lock Frozen Locked 4 Seal Lock to prevent moisture from entering 4 112
Latch Open and Close the Ski Rack on Request Will Not Close Cannot go skiing 7 Broken / Worn Spring 3 Spring Choice 5 105
Latch Open and Close the Ski Rack on Request Will Not Close Cannot go skiing 7 Broken Rivet 2 Material Choice 6 84
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Deformation 6 Material Choice 4 216
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Weakened Plastic 7 Material Choice 6 378
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Driving Forces Break Latch 3 Minimize Forces, Material Choice 10 270
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Ratchet Tooth Failure 4 Avoid Use of Ratchet Teeth 8 288
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Broken / Worn Spring 3 Spring Choice 5 135
Latch Open and Close the Ski Rack on Request Opens on its own Loss of Skis, Potentially Fatal Accidents 9 Broken Rivet 2 Material Thickness 6 108
Latch Open and Close the Ski Rack on Request Not Fully Closed Chance of Opening leading to loss of skis, potentially fatal accidents 9 Ratchet Tooth Barely Engaged 6 Color Notification 2 108
Latch Open and Close the Ski Rack on Request Not Fully Closed Chance of Opening leading to loss of skis, potentially fatal accidents 9 Debris in the Way 8 Color Notification 2 144
Latch Open and Close the Ski Rack on Request Not Fully Closed Chance of Opening leading to loss of skis, potentially fatal accidents 9 Too much in the rack 6 Color Notification 2 144
Latch Open and Close the Ski Rack on Request User Forgets to Close Loss of skis, potentially fatal accidents 9 Distracted User 4 Warning System 6 216
Latch Open and Close the Ski Rack on Request User Forgets to Close Loss of skis, potentially fatal accidents 9 Cannot See Open Rack 2 Visual Aide 7 126
Crossbars Holds the Skis Securely in Place Does not hold the skis with sufficient force Loss of skis, potentially fatal accidents 9 Different height of skis 5 Individually sliced rubber 1 45
Crossbars Holds the Skis Securely in Place Does not hold the skis with sufficient force Loss of skis, potentially fatal accidents 9 Bent Crossbars 2 Material Choice 1 18
Crossbars Holds the Skis Securely in Place Does not hold the skis with sufficient force Loss of skis, potentially fatal accidents 9 Unevenly worn rubber 3 Individually sliced rubber 1 27
Crossbars Holds the Skis Securely in Place Holds the skis too tightly Damage to skis 6 Too thick of a ski 4 More space between crossbars, taller rubber 1 24
Crossbars Holds the Skis Securely in Place Holds the skis too tightly Damage to skis 6 Bent Crossbars 2 Material Choice 1 12
Crossbars Holds the Skis Securely in Place Holds the skis too tightly Damage to skis 6 Rubber too hard 3 Material Choice 3 54
Crossbars Holds the Skis Securely in Place Does not apply uniform pressure Loss of skis, potentially fatal accidents 9
Retrieved from "http://wiki.ece.cmu.edu/ddl/index.php/Ski_rack_dfma"
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