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QFD Matrix
PHASE I QFD {Balance Training Stationary Bicycle}
Correlation Codes
Maximum force the tilt mechanism can exert back on the bike + + Very Positive
Range of tilt resistence for varying rider sizes + + Positive
Angles of lockout capability ++ - Negative
Resistence against pedals - - Very Negative
Variation from center + ++
Display size
Count falls ++ + +
Audio feedback +
Battery Life - - -
Ability to reset unit + + -
Instruction Sheet
Maintain frame stability + +
Conceal wires - -
Display box stability improved + - +
Stay quiet during operation - - +
Target
Target
Target
Target
Target
Target
Target
Down
Up
Up
Up
Up
Up
Up
Up
Preferred
Engineering Metrics
Maximum force the tilt mechanism can exert back on the bike
Range of tilt resistence for varying rider sizes
Display box stability improved
Angles of lockout capability
Stay quiet during operation
Resistence against pedals
Maintain frame stability
Customer Weights
Variation from center
Ability to reset unit
Instruction Sheet
Audio feedback
Conceal wires
Display size
Battery Life
Count falls
Customer Requirements
Have consistent resistance across range of motion 14.8 x x x
Be adjustable for patient needs 4.9 x x x x
Variable tilt angles to lockout for safety 1.6 x x x x
Avoid static starting friction 14.8 x x
Have no skipping issues throughout range of motion 14.8 x x
Clear instructions about operation 4.9 x x x x x
Large pictures for ease of understanding 1.6 x
Improve accuracy 4.9 x x
Larger display 1.6 x x
Count the number of times the patient hits the maximum tilt angle 4.9 x x x x
Audio feedback 1.6 x x
Incorporate variable tilt angles 4.9 x x x x x
Operates for a normal usage time period 4.9 x x x x
Be able to reset 4.9 x x x
Maintain stability 14.8 x x x x x
Conceal loose wires 1.6 x
Stabilize part in display 14.8 x x x
Keep mechanical noise to a minimum 1.6 x x x
350 lb/in def
100-300 Lbs
2132 mA*hr
10 Degrees
0 degrees
0-200N
Technical Targets
TRUE
TRUE
TRUE
TRUE
TRUE
75 dB
35 dB
3 Min
4 in
Better 5 x x x x
4 x x x x x
Difficulty in Achieving 3 x x x x x
2 x
Worse 1
Raw score
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
###### 0
Relative Weight
1
Needs Summary
Importan
Need The Product Needs to
ce
Have
consistent
resistance
across
range of
Need 1.1 Tilt Mechanism motion 9 0.147541 14.7541
Be
adjustable
for patient
Need 1.2 Tilt Mechanism needs 3 0.04918 4.918033
Variable
tilt angles
to lockout
Need 1.3 Safety Catch Mechanism for safety 1 0.016393 1.639344
Avoid
static
starting
Need 2.1 Pedal Resistance Mechanism friction 9 0.147541 14.7541
Have no
skipping
issues
throughou
t range of
Need 2.2 Pedal Resistance Mechanism motion 9 0.147541 14.7541
Clear
instruction
s about
Need 3.1 Instruction Sheet operation 3 0.04918 4.918033
Large
pictures
for ease
of
understan
Need 3.2 Instruction Sheet ding 1 0.016393 1.639344
Improve
Need 4.1 Tilt Sensor accuracy 3 0.04918 4.918033
Larger
Need 4.2 Tilt Sensor display 1 0.016393 1.639344
Count the
number of
times the
patient
hits the
maximum
Need 5.1 Fall Counter tilt angle 3 0.04918 4.918033
Audio
Need 5.2 Fall Counter feedback 1 0.016393 1.639344
Incorporat
e variable
Need 5.3 Fall Counter tilt angles 3 0.04918 4.918033
Be able to
Need 5.4 Fall Counter reset 3 0.04918 4.918033
Maintain
Need 6.1 Bike Frame stability 1 0.016393 1.639344
Conceal
loose
Need 6.2 Bike Frame wires 1 0.016393 1.639344
Stabilize
part in
Need 6.3 Bike Frame display 9 0.147541 14.7541
Keep
mechanic
al noise to
a
Need 7.1 Entire Bike minimum 1 0.016393 1.639344
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