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					                                                                                                               POTENTIAL
                                                                                                 FAILURE MODE AND EFFECTS ANALYSIS                                                                                                                          FMEA Number 05-XYZ
                                                                                                              (DESIGN FMEA)                                                                                                                                          Page
                        X                   System                                                                                                                                                                                                            Prepared By Chris Fox
                                            Subsystem                                                                                                                                                                                                    FMEA Date (Orig.) 5/6/11
                                            Component                                                                   Design Responsibility Dave Designer
                  Model Years(s)/Vehicle(s) Uni-ball Signo RT                                                                        Key Date 6/27/2005
                                 Core Team Chris Fox, Kerry Hinson


                                                                                                                                                                                                                                                                                      Action Results
                                                                                                                                          C
I                                                                                                                                         L
t                                                                                                                                     S   A                              O                                                       D   R                   Responsibility &                       S   O   D   R
e                    Part/                                                                                                            E   S    Causes/ Mechanisms        C                                                       E   P    Recommended   Target Completion                       e   c   e   P
m                Part Number                         Part Function                  Failure Mode              Failure Effects         V   S         of Failure           C             Current Design Controls                   T   N       Actions           Date           Actions Taken     v   c   t   N
    Uni-ball Signo RT Writing Pen
       Lower Barrel                         Provides grip for writer, and
                                            provides protection for
                                            mechanism and contents.
          Stylus Guide                          Supports ink cartridge        No function                Unable to move               6       Stylus guide opening       2 Tolerance stackup                                     1   12
                                                                                                         cartridge into point of              designed too small
                                                                                                         operation
                                                                              Partial function           Unable to move               4       Internal cavity designed   2 Tolerance stackup                                     1   8
                                                                                                         cartridge into point of              too small
                                                                                                         operation without
                                                                                                         difficulty.


          Rubber Grip                           Improved comfort              Rubber grip designed       Won't fit in large hands     8       Bad mating part (user's    4 Print review system that includes evaluation of all   3   96
                                                                              too small                  comfortably, and could               hand size) information       mating parts, and possible
                                                                                                         contribute to CTS.                                                clearance/interference issues by design team
                                                                                                                                                                           prior to release of print to toolmaker.
                                                                              Rubber grip designed       Won't fit in small hands     6       Bad mating part (user's    4 Print review system that includes evaluation of all   3   72
                                                                              too large                  comfortably.                         hand size) information       mating parts, and possible
                                                                                                                                                                           clearance/interference issues by design team
                                                                                                                                                                           prior to release of print to toolmaker.
          Barrel Thread                         Connector to upper barrel     No function                Subcomponents will not       6       Thread mismatch, or        2 Print review system that includes evaluation of all   3   36
                                                                                                         mate                                 interference                 mating parts, and possible
                                                                                                                                                                           clearance/interference issues by design team
                                                                                                                                                                           prior to release of print to toolmaker.
                                                                              Partial function           Unable to replace            4       Improper thread size for   2 Pre-production validation                             2   16
                                                                                                         cartridge without                    mating torque.
                                                                                                         difficulty.


       Barrel Spring                        Retracts ink cartridge            No function                Cartridge stays in           6       Insufficient spring        2 Tensile testing, FEA evaluation, materials testing. 4     48
                                                                                                         operational position.                pressure, or premature
                                                                                                                                              material failure.

                                                                              Unintended function        Cartridge leaks when not 4           Insufficient spring        2 Tensile testing, FEA evaluation, materials testing. 4     32
                                                                                                         in use.                              pressure, or premature
                                                                                                                                              material failure.

                                                                              Intermittent function      Unable to move               4       Bad mating part (ink       4 Print review system that includes evaluation of all   3   48
                                                                                                         cartridge into point of              cartridge) information       mating parts, and possible
                                                                                                         operation without                                                 clearance/interference issues by design team
                                                                                                         difficulty.                                                       prior to release of print to toolmaker.


       Ink Cartridge
          Ink Cover                             Protects ink from drying      No function                Ink will not transfer to     6       Improper material          3 Material Selection to reduce potential                4   72
                                                prior to initial use.                                    writing material.                    selection.
          Ink
                Ingredient: Vehicle             Acts as fluid to transport    No function                Ink will not transfer to     6       Improper formulation       2 Pre-production validation                             2   24
                                                pigments and coloring                                    writing material.                    selection
                Ingredient: Colorant            Makes writing darker and      Partial function           Ink is hard to read.         4       Improper formulation       2 Pre-production validation                             2   16
                                                clearer.                                                                                      selection
                Ingredient: Additive            Stabilize and provide         Intermittent function      Flow unevenly                4       Improper formulation       2 Pre-production validation                             2   16
                                                additional desirable                                                                          selection
                                                characteristics.
          Reservoir                             Stores ink until point of use. Plastic material cross-   Ink exhibits signs of        4       Improper material          3 Material Selection to reduce potential                4   48
                                                                               reacts with ink           contamination                        selection.
                                                                               Leaks                     Material failure - Cracks    4       Improper material          3 Spray bar test, environmental testing.                5   60
                                                                                                         or seepage.                          selection.
                                                                                                            POTENTIAL
                                                                                               FAILURE MODE AND EFFECTS ANALYSIS                                                                                                          FMEA Number 05-XYZ
                                                                                                           (DESIGN FMEA)                                                                                                                           Page
                     X                   System                                                                                                                                                                                             Prepared By Chris Fox
                                         Subsystem                                                                                                                                                                                     FMEA Date (Orig.) 5/6/11
                                         Component                                                                   Design Responsibility Dave Designer
                Model Years(s)/Vehicle(s) Uni-ball Signo RT                                                                       Key Date 6/27/2005
                             Core Team Chris Fox, Kerry Hinson


                                                                                                                                                                                                                                                                    Action Results
                                                                                                                                       C
I                                                                                                                                      L
t                                                                                                                                  S   A                            O                                          D   R                   Responsibility &                       S   O   D   R
e               Part/                                                                                                              E   S    Causes/ Mechanisms      C                                          E   P    Recommended   Target Completion                       e   c   e   P
m           Part Number                           Part Function                  Failure Mode               Failure Effects        V   S           of Failure       C            Current Design Controls       T   N       Actions           Date           Actions Taken     v   c   t   N
                                                                           Bent / Warped              Unable to move               4       Improper material        3 FEA to determine material suitability    2   24
                                                                                                      cartridge into point of              selection.
                                                                                                      operation
                                                                           Ink reservoir will not     Unable to move               4       Ink reservoir designed   2 Tolerance stackup                        1   8
                                                                           actuate without binding.   cartridge into point of              too large
                                                                                                      operation
                                                                           Cartridge profile          Unable to move               6       Bad mating part          4 Tolerance stackup                        1   24
                                                                           incorrect                  cartridge into point of              information
                                                                                                      operation
       Wax Seal                              Act as a cap to keep the ink No function                 Ink will not transfer to     6       Improper material        2 Material Selection to reduce potential   4   48
                                             from drying                                              writing material.                    selection.
       Stylus                                Lets ink flow out of the pen Intermittent function       Flow unevenly                4       Designed overclearance   2 Tolerance stackup                        1   8
                                             at a controlled rate
                                                                          Clogged                     Flow unevenly                4       Clogged / Bound          3 Reliability testing                      3   36
                                                                                                                                           ballpoint
                                                                          Contamination /             Flow unevenly                4       Improper material        2 Material Selection to reduce potential   4   32
                                                                          Corrosion                                                        selection.
       Ink Applicator                        Lets ink flow out of the pen Intermittent function       Blotchy writing              4       Improper flow            4 Pre-production validation                2   32
                                             at a controlled rate                                                                          calculations
                                                                          Intermittent function       Skips/Voids                  4       Improper flow            4 Pre-production validation                2   32
                                                                                                                                           calculations


    Upper Barrel                         Provides steady alignment for
                                         writer, and provides protection
                                         for mechanism and contents.

       Actuator                              Moves cartridge into point    No function                Unable to move               6       Designed overclearance 3    Tolerance stackup                       1   18
                                             of operation                                             cartridge into point of
                                                                                                      operation
       Barrel                                Protects user and contents No function                   Material cracks/bends        6       Improper material        2 Material Selection to reduce potential   4   48
                                             when not in use                                          during use                           selection.
       Pocket Clip                           Convenience of use         Under function                Unable to clip onto shirt    4       Improper material        2 Material Selection to reduce potential   4   32
                                                                                                      pocket                               selection.

				
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