The following table includes engineering specifications
of the design. These specifications are derived from the
different customer needs.
List of Engineering Specifications: Hand-held
Device
|
Engineering Spec.
|
Derives from Customer Needs
|
Relative Importance (-,1,3,9)
|
Description
|
Measure of Performance
|
Engineering Units
|
Marginal value
|
Ideal Value
|
Validation Method
|
|
small size
|
V1
|
9
|
Relatively small device
|
Size of device
|
LxWxD (in^3 or m^3)
|
6"x2.5"x2"
|
5"x2"x1"
|
Observation and measurement
|
|
light weight
|
V1
|
9
|
The device is light and portable
|
weight of device
|
lbs or kgs
|
1.5 lbs
|
0.5 lbs
|
Observation and measurement
|
|
hands-free
|
V2
|
3
|
The device can be used without constant need of
tactile interaction with the user
|
Boolean
|
yes/no
|
no
|
yes
|
Observation
|
|
Device life
|
V3, V4
|
3
|
The device is durable and rigid in normal, everyday
circumstances
|
Life cycle testing
|
years
|
1 year
|
2 years
|
Fatigue, life cycle and stress testing
|
|
Operating range
|
V5
|
9
|
The range of operation and detection of the device
|
Effective range testing
|
ft
|
100 ft
|
330 ft
|
Experimental
|
|
Battery life
|
V3
|
3
|
Long battery life
|
Battery life testing
|
hours
|
2 hours of use, 10 hours standby
|
5 hours of use, 24 hours standby
|
Observation and measurement
|
|
Stress requirement
|
V4
|
3
|
The device passes a physical stress test
|
Passes mechanical stress testing
|
yes/no
|
no
|
yes
|
Fatigue testing
|
|
Cost
|
V6
|
3
|
The device is low cost
|
N/A
|
$
|
$200
|
$100
|
Preliminary research from bill of materials and
processing quotes
|
NOTE: The specs in the device section were based on
the assumption that there will be a device that is used in
order to implement the final product on, but that device is
the tactile interface device team's, P11017, deliverable.
List of Engineering Specifications: Interface
Methods
|
Engineering Spec.
|
Derives from Customer Needs
|
Relative Importance (-,1,3,9)
|
Description
|
Measure of Performance
|
Engineering Units
|
Marginal value
|
Ideal Value
|
Validation Method
|
|
User friendly
|
V7
|
9
|
The device is easy to use
|
time for a new user to get used to the interface
|
minutes
|
60 Minutes
|
20 Minutes
|
Observation
|
|
audible input interface
|
V8
|
1
|
The device can be voice activated
|
Boolean
|
yes/no
|
No
|
Yes
|
design implementation
|
|
Button input interface
|
V9
|
9
|
The device has a button interface
|
Boolean
|
yes/no
|
No
|
Yes
|
design implementation
|
|
Audible output interface
|
V10
|
9
|
The device has and audible output interface
|
Boolean
|
yes/no
|
No
|
Yes
|
design implementation
|
|
Tactile output interface
|
V11
|
1
|
The device has a tactile output interface
|
Boolean
|
yes/no
|
No
|
Yes
|
design implementation
|
|
Fast response speed
|
V12
|
3
|
The device has low time delay
|
Experimental time delay testing
|
seconds
|
30 seconds (full process)
|
15 seconds (full process)
|
Observation and measurement
|
List of Engineering Specifications: Information
and Database
|
Engineering Spec.
|
Derives from Customer Needs
|
Relative Importance (-,1,3,9)
|
Description
|
Measure of Performance
|
Engineering Units
|
Marginal value
|
Ideal Value
|
Validation Method
|
|
Multi-platform
|
V13
|
9
|
System works on multiple platforms
|
Boolean
|
yes/no
|
No
|
Yes
|
Design implementation
|
|
Easy to synchronize
|
V14
|
3
|
The user can update the firmware using a computer
|
Boolean
|
yes/no
|
No
|
Yes
|
design implementation
|
|
Accurate information
|
V15
|
9
|
The information downloaded by the device is accurate
|
Collect data and perform statistical analysis
|
probability of accuracy
|
50%
|
85%
|
Observation
|
|
real-time arrival notification
|
V16
|
9
|
The device receives information in real-time
|
Calculate average time delay
|
seconds
|
2 seconds
|
0.5 seconds
|
observation
|
List of Engineering Specifications: Additional
features and options
|
Engineering Spec.
|
Derives from Customer Needs
|
Relative Importance (-,1,3,9)
|
Description
|
Measure of Performance
|
Engineering Units
|
Marginal value
|
Ideal Value
|
Validation Method
|
|
Aesthetically pleasing
|
V17
|
1
|
The device is aesthetically pleasing
|
Boolean
|
yes/no
|
No
|
Yes
|
Observation and measurement
|
List of Engineering Specifications: Device on
the Bus
|
Engineering Spec.
|
Derives from Customer Needs
|
Relative Importance (-,1,3,9)
|
Description
|
Measure of Performance
|
Engineering Units
|
Marginal value
|
Ideal Value
|
Validation Method
|
|
small size
|
V20
|
9
|
The device should take up a small space inside or on
the bus
|
Dimensions and tolerances
|
LxWxD (in^3 or m^3)
|
12"x12"x12"
|
6"x6"x6"
|
Observation and measurement
|
|
light weight
|
V20
|
9
|
The device is relatively light
|
Weigh the device
|
lbs or kgs
|
10 lbs
|
5 lbs
|
Observation and measurement
|
|
Low cost (manufacturing and selling)
|
V18
|
9
|
The device is inexpensive to manufacture and can be
sold at a reasonable price
|
Bill of materials and processing costs
|
$
|
|
|
Collection of information for materials and processes
|
|
Low power requirement
|
V19
|
3
|
The device operates using the bus as a power source
|
Boolean/system power requirement calculations
|
Watt
|
|
|
design and implementation
|
|
Device life
|
V22
|
9
|
The device is durable and rigid in normal, everyday
circumstances
|
Estimate and statistical analysis
|
years
|
1 year
|
3 years
|
Fatigue testing
|
|
Easy to install
|
V20
|
9
|
The device is easy to install without the need for
special tools
|
Measure the amount of time and number of steps
required
|
hours/number of steps for installation
|
|
|
|
|
Easy to replace
|
V20
|
9
|
The device is easy to replace within its own
containment without the need for special tools
|
Boolean
|
Yes/No
|
No
|
Yes
|
Design implementation
|
|
Weatherproof
|
V22
|
9
|
The device can withstand weather conditions in
Rochester, NY
|
Boolean
|
Yes/No
|
No
|
Yes
|
Design implementation
|
|
Low maintenance
|
V21
|
9
|
The device is low maintenance and can be easily
replaced or repaired. It needs little or no cleaning
from the user
|
Boolean
|
Yes/No
|
No
|
Yes
|
Design implementation
|
|
Safe
|
V24
|
3
|
The device is encased in a non-conductive case that
withstands the conditions of the bus without posing a
risk to the passengers
|
Boolean
|
Yes/No
|
No
|
Yes
|
Design implementation
|
|
Bus driver notification
|
V23
|
9
|
The bus driver is notified in case the bus is
selected by VIP
|
Boolean
|
yes/no
|
No
|
Yes
|
Design implementation
|
Home
