Wikipedia:Sandbox

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=FMEA=
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=Failure Mode and Effects Analysis=
Failure Mode and Effects Analysis (FMEA) is a crucial tool in determining if a particular component in a system will fail (in terms of the customer's requirements). By looking at each piece, we can rate the severity of a failure (S), the probability that it will occur (P), and the likelihood that the customer would detect the failure (D). The severity of failure is rated between 1-10, 1 being the effect is not noticed by the consumer, while 10 is hazardous. Probability of occurence is also rated from 1-10, 1 being extremely remote while 10 has an extremely high chance of occurring. Finally, detection is rated from 1-10 with 1 being almost certain to detect and 10 being no chance of detection whatsoever.  With these three factors, we can multiply them together to achieve a total risk priority number (RPN) which can range from 1-1000 (1000 being the greatest risk). Below is a table outlining each part.
Failure Mode and Effects Analysis (FMEA) is a crucial tool in determining if a particular component in a system will fail (in terms of the customer's requirements). By looking at each piece, we can rate the severity of a failure (S), the probability that it will occur (P), and the likelihood that the customer would detect the failure (D). The severity of failure is rated between 1-10, 1 being the effect is not noticed by the consumer, while 10 is hazardous. Probability of occurence is also rated from 1-10, 1 being extremely remote while 10 has an extremely high chance of occurring. Finally, detection is rated from 1-10 with 1 being almost certain to detect and 10 being no chance of detection whatsoever.  With these three factors, we can multiply them together to achieve a total risk priority number (RPN) which can range from 1-1000 (1000 being the greatest risk). Below is a table outlining each part.
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=Fender Bridge FMEA=
{| class="wikitable" border="1"  
{| class="wikitable" border="1"  
|-  
|-  
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! Part & Function !! Failure Mode !! Effect of failure !! Causes of failure !! Detection !! S !! O !! D !! RPN !! Action !! S !! O !! D
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! Part & Function !! Failure Mode !! Effect of failure !! Causes of failure !! Detection !! S !! O !! D !! RPN !! Action !! S !! O !! D !!RPN
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|-  
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! Row header 1  
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|- valign="top"
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| cell 1,1 || cell 1,2
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| rowspan="1" | (G1) Back Panel/ Pickguard Screws
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|-  
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*Fastener for back panel
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! Row header 2  
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| Stripped Screw ||
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| cell 2,1 || cell 2,2  
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Lodged Screw
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|}
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| *Wrong Screwdriver <br />*Over tightening of screw || Stuck Screw|| 3 || 3 || 2 || 18 ||
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Advise user of possibility of stripped screws
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|| 3 || 2 || 2 || 12
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|- valign="top"
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| rowspan="1" | (G2) Back Panel
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*Protects Rear Bridge Mount and Springs
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| Brittle Fracture ||
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Exposed Springs and rear bridge
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| *Dropping on a hard surface and/or a great height || Broken Plastic Pieces|| 4 || 5 || 1 || 20 ||
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Replace plastic material with something more robust like steel or aluminum
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|| 4 || 3 || 1 || 12 
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|-
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! (G3) Strings
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|-
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! (G4) Springs
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|-
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! (G5) Whammy Bar
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|-
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! (G6) Bridge Mounting Screws
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|-
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! (G7) Bridge Assembly
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|-
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! (G8) Spring Claw
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|-
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! (G9) Spring Claw Screws
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|-
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! (G10) Saddle Plate
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|-
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! (G11) Saddle Spring}
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|-
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! (G12) Saddle Screw
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|-
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! (G13) Neck
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|-
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! (G14) Neck Mounting Plate
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|-
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! (G15) Bridge Block
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|-
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! (G16) Bridge Block Mounting Screws
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|-
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! (G17) Guitar Body
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|-
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! (G18) Bridge Plate
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|-
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}
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{| class="wikitable" border="1" cellspacing="0" align="center"
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|- align="center"
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! colspan="2" | Description
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| '''Standard Toaster''' || '''Clear Wall Toaster''' || '''Fold Out Toaster''' || '''Enclosed Toaster''' || '''Front Load Toaster'''
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|- align="center"
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! colspan="2" | Sketch ||  [[Image:toaster.jpg|200px]] || [[Image:Toaster-ClearWall-Overall.jpg|200px]] || [[Image:toaster-FoldOut-Open.jpg|200px]] || [[Image:Toaster-Enclosed-Front.jpg|200px]] || [[Image:Toaster-FrontLoad-Overall.jpg|200px]]
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|- align="center"
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| style="border-bottom:3px solid grey;" | '''Criteria''' || style="border-bottom:3px solid grey;" |'''Weight''' || style="border-bottom:3px solid grey;" | '''Datum 1''' || style="border-bottom:3px solid grey;" | '''Design 1''' || style="border-bottom:3px solid grey;" | '''Design 2''' || style="border-bottom:3px solid grey;" | '''Design 3''' || style="border-bottom:3px solid grey;" | '''Design 4'''
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|-
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}

Current revision

Failure Mode and Effects Analysis

Failure Mode and Effects Analysis (FMEA) is a crucial tool in determining if a particular component in a system will fail (in terms of the customer's requirements). By looking at each piece, we can rate the severity of a failure (S), the probability that it will occur (P), and the likelihood that the customer would detect the failure (D). The severity of failure is rated between 1-10, 1 being the effect is not noticed by the consumer, while 10 is hazardous. Probability of occurence is also rated from 1-10, 1 being extremely remote while 10 has an extremely high chance of occurring. Finally, detection is rated from 1-10 with 1 being almost certain to detect and 10 being no chance of detection whatsoever. With these three factors, we can multiply them together to achieve a total risk priority number (RPN) which can range from 1-1000 (1000 being the greatest risk). Below is a table outlining each part.

Fender Bridge FMEA

}
Part & Function Failure Mode Effect of failure Causes of failure Detection S O D RPN Action S O D RPN
(G1) Back Panel/ Pickguard Screws
  • Fastener for back panel
Stripped Screw

Lodged Screw

*Wrong Screwdriver
*Over tightening of screw 		Stuck Screw 3 3 2 18

Advise user of possibility of stripped screws

3 2 2 12
(G2) Back Panel
  • Protects Rear Bridge Mount and Springs
Brittle Fracture

Exposed Springs and rear bridge

*Dropping on a hard surface and/or a great height Broken Plastic Pieces 4 5 1 20

Replace plastic material with something more robust like steel or aluminum

4 3 1 12
(G3) Strings
(G4) Springs
(G5) Whammy Bar
(G6) Bridge Mounting Screws
(G7) Bridge Assembly
(G8) Spring Claw
(G9) Spring Claw Screws
(G10) Saddle Plate
(G11) Saddle Spring}
(G12) Saddle Screw
(G13) Neck
(G14) Neck Mounting Plate
(G15) Bridge Block
(G16) Bridge Block Mounting Screws
(G17) Guitar Body
(G18) Bridge Plate
}
Description Standard Toaster Clear Wall Toaster Fold Out Toaster Enclosed Toaster Front Load Toaster
Sketch
Criteria Weight Datum 1 Design 1 Design 2 Design 3 Design 4
Retrieved from "http://wiki.ece.cmu.edu/ddl/index.php/Wikipedia:Sandbox"
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