P13026: PORTABLE VENTILATOR
TEAM LEADER: DANIEL FENTON
KENNEDY KONG
MARIE REVEKANT
DAVID ENGELL
ERIC WELCH
DEREK ZIELINSKI
CHRIS FREEMAN
MELISSA HARRISON
RYAN MUCKEL
ROBERTO CASTILLO ZAVALA
ENGINEERING
SPECIFICATIONS
Portable Emergency Ventilator
Engineering Specifications - Revision 5 - 2/8/13
Specification
Number
Importance
Sourc
e
Function
S1
3
CN1
System Operation
Volume Control
Liters
S2
3
CN1
System Operation
Breathing Rate
BPM, Breaths per Minute
S3
3
CN1
System Operation
Peak Flow
Liter/Min
15 - 24
10%
S4
3
CN1
System Operation
Air Assist Senitivity
cm H20
0.5 - 1.5
10%
S5
3
CN1
System Safety
High Pressure Alarm
cm H20
10 - 70
10%
S6
3
CN1
System Operation
DC Input
Volts
6 - 16
S7
3
CN1
System Operation
DC Internal Battery
Volts
12
S8
3
CN4
System Operation
Battery Operation Time
Hours
1
S9
3
PRP
System Safety
Elasped Time Meter
Hours
0 - 2000
S10
3
PRP
System Longevity
Pump Life
Hours
2000
S11
3
PRP
System Safety
Secondary Pressure Relief
cm H20
75
S12
3
PRP
System Safety
Timed Backup BPM
seconds
15
S13
2
CN8
System Operation
Blood Oxygen Level
%
88-100
S15
2
System Robustness
Operational Temperature
Degrees Celsius
0 - 40
Volume
cm3
10,000
Kg
<8
S16
2
CN2
System Portability
Specification (Metric)
S17
3
CN2
System Portability
Weight
Importance Weight: 3 = Must Have, 2 = Nice to Have, 1 = Preference Only
Unit of Measure
Target Value
Accuracy
0.2 - 1.2
10%
4 -15
±2
Comments / Status
PARKER T1-1HD-121NEA
Peak Flow = 32.5* LPM
12 VDC
Weight = 1.5 kg
Pump Life = 3500 hours
16.5 x 7 x 9.9 cm
(6.5 x 2.75 x 3.91 in)
PNEUMATIC SCHEMATIC
TUBING HEAD LOSS ANALYSIS
(BETWEEN PUMP OUTLET AND VENTILATOR OUTLET)
Bernouli’s Equation Assumptions
• Constant velocity, height and air density
Major Head Loss:
• Dependent on length of tube between ventilator and pump exit
Minor Head Loss
• Dependent on the expansion and contraction for two T-joints
𝑃1 𝑉12
𝑃1 𝑉22
𝑃1 − 𝑃2
+
+ 𝑔𝑧1 −
+
+ 𝑔𝑧2 =
= ℎ𝑙𝑇
𝜌1
2
𝜌2
2
𝜌
ℎ𝑙𝑇
𝐿 𝑉2
𝑉22
𝑉22
= ℎ𝑙𝑚 + ℎ𝑙 = 𝑓
+ 2 𝐾𝑐
+ 𝐾𝑒
𝐷 2
2
2
Δ𝑃 = 𝜌ℎ𝑙𝑇 = 𝜌
𝐿 𝑉2
𝑉22
𝑉22
𝑓
+ 2 𝐾𝑐
+ 𝐾𝑒
𝐷 2
2
2
= 0.0198 𝑝𝑠𝑖
MASS FLOW SENSOR ANALYSIS
Cross Sectional View of Mass Flow Junction
Color Code
•
•
•
•
•
Blue = Tubing
Black = T-Joint
Red = Mass Flow Sensor
Orange = Control Volume for Mass Flow Route
Green = Control Volume for Main Route
MASS FLOW SENSOR ANALYSIS
Circuit Analogy
i2
i
R2
vi
vf
i1
R1
Color Code
• Orange = Control Volume for Mass Flow Route
• Green = Control Volume for Main Route
Analogy Explanation
• Current ≈ Flow Rate
• Resistance ≈ Head Loss
• Voltage Drop ≈ Pressure Drop → Constant through each path!
i
MASS FLOW SENSOR ANALYSIS
Head Loss Through Main Tubing Path (Green)
• Minor
•
•
Expansion from first T-Joint to Tubing
Contraction from Tubing to second T-Joint
•
Frictional loss along length of tubing
• Major
Head Loss Through Mass Flow Path (Orange)
• Minor
•
•
•
•
•
Contraction from Original flow to first T-Joint
Expansion from first T-Joint to Tubing
Two curves (approximated as 90 degree angles)
Contraction from Tubing to second T-Joint
Expansion from second T-joint to original flow
• No Major Losses (length of tubing is negligible)
• Mass Flow Sensor Pressure Drop
MASS FLOW SENSOR ANALYSIS
Pressure Drop
• Assuming constant height, density and velocity
𝑃1 𝑉12
𝑃1 𝑉22
𝑃1 − 𝑃2
+
+ 𝑔𝑧1 −
+
+ 𝑔𝑧2 =
= ℎ𝑙𝑇 ⟹ ΔP = 𝜌ℎ𝑙𝑇
𝜌1
2
𝜌2
2
𝜌
Total Head Loss
ℎ𝑙𝑇 = ℎ𝑙𝑚 + ℎ𝑙
Major Head Loss
𝐿 𝑉2
ℎ𝑙 =𝑓 𝐷 2
Minor Head Losses
• Contraction and Expansion
ℎ𝑙𝑚
𝐶
𝑉2
= 𝐾𝑐
2
• Curves
𝐿𝑒 𝑉 2
ℎ𝑙𝑚 =𝑓
𝐷 2
ℎ𝑙𝑚
𝐸
𝑉2
= 𝐾𝑒
2
MASS FLOW SENSOR ANALYSIS
Mass Flow Sensor Pressure Drop
• Calculated by interpolating from provided table
• Assumed flow would be between 200 and 400 sccm (based on educated guess)
Δ𝑃𝑚𝑓
𝑄2 − 200
= 31 +
83 − 31
400 − 200
Final Calculations
• Only unknown is Q2
• Plugged all equations into an excel sheet and changed value of Q 2 until the difference between
the pressure drops in each path was negligible (8.49e-8)
𝑐𝑚3
𝑄2 = 278.73
𝑚𝑖𝑛
HONEYWELL
AWM2300V
FEATURES
• Bidirectional sensing capability
• Actual mass air flow sensing
•Low differential pressure sensing
The AWM2000 Series microbridge
mass airflow sensor is a passive
device comprised of two Wheatstone
bridges. Data is transmitted via
analog.
A typical application is in medical respirators and ventilators.
HONEYWELL
AWM2300V CONT.
Performance Characteristics @ 10.01 +/- 0.01 VDC, 25°C
Characteristic
Value
Flow Range
(Full Scale)
+/- 1000 sccm
Accuracy
2.5%
Weight
10.8g
Power
Consumption
30mV – 50mV
Sensor Current Max. 0.6mA
Response
Time
1msec – 3msec
Temp. Range
Oper. -25°C to +85°C
Storage: -40°C to +90°C
Dimension
31.5mm x 54.4mm x
15.5mm
NPC-1210
LOW PRESSURE SENSOR
Applications:
• Medical Equipment
•Ventilation
•Respirator monitoring
Features:
• High Sensitivity
•High accuracy
•CB mountable package
•DIP package
•Solid-state reliability
•Individual device traceability
NPC-1210
LOW PRESSURE SENSOR
Characteristic
Value
Pressure
Range
(Full Scale)
1psi or 70.3cmH2O
To
3psi or 155.1cmH20
Accuracy
.5%
Weight
2.5g
Temp. Range
Oper. -40°C to +125°C
Storage: -55°C to
+150°C
Dimension
15.24mm x 15.24mm x
4.2mm
Output Type
Analog
CONTROL SYSTEM
K70 MCU Tower kit
NEC 5.7” FutureTechnology TouchStone
Low-Voltage, 3-Phase Motor Control
Medial Development Module
Pulse Oximeter
Bluetooth Module
K70 TOWER SYSTEM
TWR-K70F120M-KIT
32-bit ARM® Cortex™-M4
• All the ARMv7E-M architecture
instructions
• Maximum core operating
frequency of 120MHz
Onboard LCD graphics
control module
• TouchStone
• Larger screens
Tamper detection Security
Freescale supplies code for
majority of our functionality
• Reduces learning curve.
5.7” TOUCHSTONE
Future Technology
LCD: NL6448BC1801
TWR-PIM-41WVGA
Display Kit
TouchStone
interface allows
K70 to drive bigger
screens
LOW-VOLTAGE
3-PHASE MOTOR
CONTROL
TWR-MC-LV3PH
Three-phase Brushless
DC (BLDC)
Permanent Magnet
Synchronous Motor
(PMSM)
Power supply voltage
input 12-24VDC,
extended up to 50VDC
Output current up to 8
amps
MEDIAL DEVELOPMENT
MODULE
TWR-MCF51MM
Can operate as a
stand alone
debugging tool
Required for the
MED-SPO2
BLUETOOTH
CONNECTIVITY
TWRPI-BLEDEMO
Connects onto
the K70 Board
Discovery
• Potential
connectivity to
mobile device
• Potential Bluetooth
pulse oximeter
PULSE OXIMETER
This external device will allow for an EMT to
monitor a patient’s Blood Oxygen level as well
as their pulse. The Pulse Oximeter chosen for
this prototype will be the Nellcor DS-100A
Reusable Finger Clip. This device will interface
with the Freescale MED-SPO2 development
board via a DB9 connection. The MED-SPO2 is
a MOD that can be attached to the K-70 tower
to allow the data being created by the Pulse
Oximeter to be displayed on the screen of the
K-70.
This particular Pulse Oximeter has been
chosen because there is clear documentation
on how to interface it with the Freescale
hardware we will be using for the control
system.
PULSE OXIMETER
(CONT.)
PULSE OXIMETER
(CONT.)
OTHER COMPONENTS
ELAPSED TIME METER
Item
Hour Meter
Type
LCD
Time Range (Hours)
0 to 99,999
Bezel Face (In.)
2.12 x 1.25
Bezel Face Type
2-Hole Rectangular
Voltage
4.5 to 28VDC
Display Units
Hours and Tenths
Depth (In.)
0.51
Length (In.)
1.22
Width (In.)
2.12
Ambient Temp. Range (F)
-22 a 149
Material of Construction
ABS
Reset Type
Remote Signal
Fits
1.45"x0.95"
Mounting Method
Flange
Terminal Type
Spade
OTHER COMPONENTS
TUBING MATERIAL
Item
I.D. (in)
O.D. (in)
Wall Thickness
(in)
Minimum Bend
Radius (in)
Max Working
Pressure (psi)
Air Tubing
1/8
3/16
1/32
1/2
30
Air Tubing
3/8
5/8
1/8
1-1/8
40
POWER SYSTEM
POWER FLOW
TEKKEON MP3450I
•
•
•
•
•
•
•
•
•
•
•
12V, 5V Li-Ion
60 Wh
< 1 lb.
3.3" x 6.8" x 0.9" (20.2 in3)
Built in charging port, prevents
overcharging
Comes with 90-240VAC charger, can also
be charged with 9-24VDC
Low battery audible alert
Price: $200, inc. tax & shipping
Operating temps: -10°C to 60°C
Charging temps: 0°C to 45°C
Capacity reduces to 70% after 300
charge/discharge cycles
FEASIBILITY - POWER
ANALYSIS
Current (A) Voltage (V)
Power (W)
Pump*
3.8
12
22.8
MCU (K70P256M120SF3)
0.3
3.8
1.14
NEC 4.3" LCD (NL4827HC1905B)
0.2764
5
1.382
Total
25.322
*Assumes pump is running at 50% duty cycle
Battery Voltage (V)
12
Battery Capacity (Ah)
5
Battery Capacity (Wh)
60
Expected Battery Life (Hours)
2.37
FEASIBILITY BATTERY LIFETIME
Battery capacity (Wh)
60
Power draw (Wh)
25.322
Battery capacity after 300 charge cycles
70%
Number of charge cycles
550
New expected battery life (Hours)
1.07
Average number of uses per week*
5
Battery lifetime (years)
2.12
*Estimated number of uses per week
THERMAL ANALYSIS
Goal: Ensure styrene shell
won’t melt during
operation
Primary Thermal Loads
•
•
•
•
Pump Motor (20 W)
Battery (5 W)
MCU (5 W)
Total with FOS = 2 (60 W)
Assumptions
• Natural Convection (5 W/m2)
• Neglect Radiation
• Uniform Distribution of Heat
Generation
• Simplified Geometry and
Removal of Accessories
• 300 K Bulk Temperature
RESULTS
TEST PLANS FOR MCU
AND MODULE
Phase 1: Model View Control architecture
MCU
The K70 will be the Model and View. The modules are controls.
• Create “test” inputs.
• If a new mode is selected, it would poll the selected settings.
• Passes instructions to the other modules, like the Motor controller to change
the motor signal.
Model:
• Model should be quick to process all the information
• Test Inputs should be responsible and almost instantaneous due to high risk.
View:
• Create display for how all the information pass through the switches and
knobs.
• Change in Setting during operation:
• If change in setting, the display will reflect this action.
• Change in mode:
• If different mode was selected, it would display a set of settings specifically for
the setting.
SCREEN TEST PLAN
Majority of the View portion of the MVC architecture.
• Follow MCU tutorials to obtain basic communication with the
LCD.
• Create Simple GUI
• Create Buttons
• Create animation.
Responsive stress test:
• Send numerous redraw instructions to force screen to refresh
as quickly as possible. If user were to spam inputs.
• Calculate the average response rate.
3 PHASE MOTOR
CONTROL TEST PLAN
Majority of the Control portion of the MVC architecture
• Test constant Voltage output.
• Send constant voltage
• Measure the voltage across the motor control pins over time
• Test rising voltage out
• Send raising voltage command
• Measure the voltage across the motor control pins over time
• Test pulse voltage out
• Send pulse voltage command
• Measure the voltage across the motor control over time
• Test Sine voltage out
• Send a wave of voltage command
• Measure the voltage across the motor control over time
• Stress test
• Send series of various output patters, then quickly cut power to zero,
simulating emergency cut off
• Measure the voltage across the motor control over time.
POWER SYSTEM
TESTING
Specifications Tested
Test Spec Description
Critical Value
Nominal Value
S6
Battery must be able to be charged with a range of
voltages
12 to 24 V
6 to 24 V
S7
Battery must output a voltage of 12V to power the
pump and 5V to power the MCU
11 to 13V and
5V
12V and 5V
S8
Battery must power the unit for at least 1 hour
>1 hour
>2 hours
S15
Battery must be able to operate in all temperature
situations
<0° C
<-20° C
Tests to be run
1. Battery life - Determine how long the battery can operate the pump for before the battery
shuts down at room temperature. Repeat test with temperatures of -20° C.
2. Input voltages - Ensure the battery can be charged with both 120V AC and with a range of
DC voltages.
3. Output voltages - Ensure the battery can provide both 5V to the MCU and 12V to the pump
for the duration of it’s life.
USER INTERFACE
13 PRINCIPLES OF
DISPLAY DESIGN
1.
Make displays legible (or audible)
2.
Avoid absolute judgment limits
3.
Top-down processing
4.
Redundancy gain
5.
Discriminability
6.
Pictorial Realism
7.
Moving Part (compatibility)
8.
Information access cost
9.
Proximity Compatibility
10.
Multiple resources
11.
Predictive aiding
12.
Knowledge in the world
13.
Consistency
Perceptual
Principles
Mental Model
Principles
Principles
based on
Attention
Memory
Principles
PROBLEMS
Make legible displays
-readability of scales and settings
Avoid absolute judgment
-ranges of knobs
Redundancy
-usability for user
Proximity Compatibility
-location of user controls
Top-down processing
- Assimilating knob sizes with functionality
NEW DESIGN
PRINCIPLES
Principle of pictorial realism
• Battery charge displayed as symbol for battery
• Heart rate indicated by heart symbol
• Adding more symbols to redundantly display realism
Principle of moving part
• Any loaded data will mimic real movement and typical
psychological movements in humans
USER CONTROLSSPEAKER
CUI Inc.CDMG16008-03-ND
USER CONTROLSSETTINGS SWITCHES
TE ConnectivitySWITCH KNOB STRGHT 0.76" W/SPIN
Kilo InternationalKNOB BLK GLOSS.625"DIA.125"SHAFT
Kilo InternationalKNOB BLK MATTE.50"DIA 6MM SHAFT
SWITCHES
Manual Switch
NKK SwitchesSWITCH PUSHBUTTON DPDT 3A 125V
Power Switch
TE ConnectivitySWITCH ROCKER SPST 20A 125V
Mode Switch
Kilo InternationalKNOB BLK MATTE.50"DIA .125"SHAFT
Reset Switch
Grayhill Inc.SWITCH PUSH SPST-NC 1A 115V
USER INTERFACE
TEST PLANS
Objective: how inherent it is to use; ease of use
Subjects: RIT ambulance, doctors from RIT health center, ski
patrollers
Procedure:
1. design a mock up of user interface using actual user
controls
2. design a set of tasks for the subjects to complete that
simulate situation encountered while utilizing ventilator
3. record data: tasks performed correctly, general
observations
3. perform statistical analysis on data collected for
percentages of subjects that complete tasks correctly
PLASTIC SHEETING
•
•
•
•
Strong
Waterproof
Connections (screws, bolts, etc.) easily attached
Cost Effective
• Between $6-$40 for 2880 square inches.
• Adjustable / Easily Worked With
• When heated, becomes extremely flexible and can be bent to
specified angles. (Vaccu-form, manual shaping)
• When cooled, retains shape and strength.
BOM
Item
Needed for?
ELECTRICAL PARTS
Li-Ion battery
Powering device
Car charger
Charging battery in vehicle
Barrel Connector (PP3-002A)
Connecting battery to outside casing
Barrel Connector (PJ-006AA)
Connecting battery to outside casing
MECHANICAL PARTS
1/8" ID Tygon Tubing (5554K11)
Air Tubing
3/8" ID Tygon Tubing (5554K17)
Air Tubing
ENM Hour Meter
Elasped Time Meter
Air Pump (T1-1HD-12-1NEA)
Moving Air
3/8" - 1/8" Tee Fitting (5116K401)
Tube connections
3/8" 90 Fitting (2974K161)
Tube connections
3/8" Straight Fitting (2974K133)
Tube connections
10-24 x 1/2" Screws (90273A242)
Mounting
10-24 x 1 1/2" Screws (90273A251 ) Mounting
3/8" x 12" x 24" PVC (8747K127)
Baseplate
1" x 2" x 12" Delrin (8662K63)
Machined Adapters
SENSORS
AWM2300V Mass Flow Senson
Flow control
NPC-1210-005-A-1-L Pressure
Monitor feedback pressure
Nellcor DS-100A Pulse Oximeter
Measure Pulse and Blood/Oxygen Levels
USER INTERFACE
Speaker-CDMG16008-03-ND
user interface/ warning alarms
Settings Knobs
user interface
SWITCH KNOB STRGHT 0.76"
user interface
KNOB BLK
user interface
KNOB BLK MATTE.50"DIA 6MM
Mode Switch-KNOB BLK
user interface
Reset button-SWITCH PUSH SPST- user interface
Manual Button-SWITCH
user interface
Power Switch- SWITCH ROCKER
user interface
Manufacturer
Tekkeon
Tekkeon
CUI Inc
CUI Inc
Mcmaster
Mcmaster
Grainger
Parker
Mcmaster
Mcmaster
Mcmaster
Mcmaster
Mcmaster
Mcmaster
Mcmaster
Quantity
Price/each Lead Time Status
1
1
1
1
$172.00 7-10 days
$8.00 7- 10 days
$1.36 5-7 days
$1.49 5-7 days
1
1
1
1
1 Pack
1 Pack
1 Pack
1 Pack
1 Pack
1
1
$9.00 5-7 days
$20.60 5-7 days
$33.25 5-7 days
$297.00 <25 days
$5.57 5-7 days
$6.05 5-7 days
$5.53 5-7 days
$6.02 5-7 days
$6.89 5-7 days
$23.10 5-7 days
$20.65 5-7 days
Honeywell
GE M&C / NovaSensor
Nellcor
1
1
1
$107.82
$34.33
$60.00
5-7 days
on-order
5-7 days
CUI Inc.
1
$2.51
5-7 days
TE Connectivity
Kilo Industries
Kilo industries
Kilo Industries
Grayhill Inc.
NKK Switches
TE Connectivity
3
3
3
1
1
1
1
$2.96
$6.98
$6.30
$8.57
$3.21
$32.73
$3.98
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
long lead time
not determined
not determined
mechanical
BOM
Item
LCD Screen with Touchstone
TWR-K70F120M-KIT
TWR-MC-LV3PH
TWRPI-BLE-DEMO
TWR-MCF51MM
MED-SPO2
TWR-PROTO
Sheets of styrene
Resin bond
blue foam
yellow foam
zippers
fabric
velcrow
strap
Needed for?
COMPUTER PARTS
GUI
MCU Tower kit
Low-Voltage, 3-Phase Motor Control
Bluetooth Module
Medial Development Module
Pulse Oximeter
ProtoBoard
PACKAGING
Build Housing
assemble housing and models
models
models
tote
tote
tote
tote
Manufacturer
Quantity
Future Technologies
Freescale
Freescale
Freescale
Freescale
Freescale
Freescale
Curbell (RIT)
TAP Plastics
DOW
DOW
Joann Fabric
Joann Fabric
Joann Fabric
Lowepro
Price/each Lead Time Status
1
1
1
1
1
1
1
1- 4'x3'
1- 8oz.
6 sheets
15"x11"x7"
1
2 yds
1
1
Sub Total
Sponsorship
Total
$312.23
$179.00
$159.00
$149.00
$59.00
$59.00
$14.99
$21.60
$8.00
$10.00
$70.00
$10.88
$30.00
$5.00
$15.00
$2,021.08
-$99.71
$1,921.37
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
5-7 days
-
5-7 days
Pricing
Pricing
Pricing
Pricing
Pricing
Pricing
Pricing
RISK ASSESSMENT
2
3
4
5
6
7
8
9
10
Integration of
hardware and
software
together
inputs do not
match outputs
Tech Concerns
electronic components;
environment; mis-use;
2 3
upkeep
using devices from
1
different companies that
don't function together
programing and calibration
2
errors
2
2
3
non-workable
prototype
failing to meet FDA
requirements
system not function;
oversight on PCB not fitting in desired lack of knowledge into
requirement
volume
how many switches need
lack of space; components
mountability of
not coinsiding with desired
components
design change
layout
screen not
compatible with downgrade screen
MCU
size
software failure
battery
integration in
underperforming;
battery failure; not
system
fire hazard
meeting engineering specs
inaccurate
readout from
mass flow
sensor
check failure
interpolation was not valid
components
components
Durability
breaking; failure of malfunctioning during
failure
system
usage
human
computer
interface failure operator confusion
2
2
1
1
2
2
cuttered interface
1
2
2
2
2
3
3
Importance
over heating
damaged
components; total
system failure
Cause
Severity
1
Effect
Likelihood
Risk Item
Date of
Completion
Action to Minimize Risk
Owner
6 basic thermal analysis;
provide safety cautions Chris
plan and read specs on
all technical
2 components; test
components
compatability
Derek
Chris/
2
quality testing of design Kennedy
week 9- MSD1
week 9- MSD1
MSD2
6
schematic planning
Dan
MSD2-1
layout planning
Melissa
MSD2- 6
4
4
using a smaller screen Kennedy
check with experts on
2 how to manage battery
functionality
Eric
MSD2- 1
MSD2
2
calibrate during testing Ryan
perform vibration
6 testing; perform
environmental testing Ryan
perform usability
6 analysis; 13 principles of
display design; iterate Marie/
to next MSD group
Dave
MSD2- 2
MSD2
week 2- MSD2
11
Over budget
12
13
14
uncoordinated
team schedule
modification to
design schedule;
miss deadlines
late delivery of
parts
Remaining
substantially
design that is not
equivalent with capable with FDA
current design approval
15
conflicts with
customer
16
Project Concerns
necessary parts more
cannot build a
expensive than budget
3 3 9
working prototype
leaving not enough money
request funding from
that looks like vision for aesthetics
suppliers
Marie
late completetion of
deliverables; lack of conflicting schedules and
discussion at beginning
2 3 6 of MSD2 of schedules
team unity
desired meeting times
Dan
more budget
needed; change
design schedule
product does
not match
consumer needs not profitable
lack of planning; problems
with vendors
changing the current
design drastically beyond
the FDA approved design
change in market; change
in design plans; change in
prospective
not meeting trends
1
1
2
3
2
2
2
3
order parts ahead of
2 time; expedite when
necessary
Melissa
make sure any major
changes to design are
validated with client
Chris
team members should
maintain open
4 communication with
client; relevant market
research
Dave
week 9- MSD1
MSD2- 1
week 5- MSD2
3
week 9- MSD1
6
benchmarking research Roberto
Severity Scale: 1 = Not Severe 2 = Moderately Severe 3 = Very Severe
Likelihood Scale: 1 = Not Likely 2 = Conceivable 3 = Very Likely
Importance= likelihood* severity
PROJECT FUTURE
Features
Mediresp III Worst Case
volume control
x
BPM
x
peak flow
x
air assist
x
high pressure alarm
x
DC input
6V-16V
DC internal battery
x
battery operation time
2-hr
elapsed time meter
x
pump life
x
2nd pressure relief
x
time to back-up
x
blood oxygen level
CO2
Operation temperature
dimensions
11inx13inx7in
weight
~23lbs.
drop height
~ 1m
screen color
analog
b/w
screen size
1in x 2.5in.
3.5in
Mediresp IIII
Nominal
x
x
x
x
x
9V-24V
x
1-hr
x
x
x
x
x
Best Case
0-30 deg. C
>current
>17lbs.
color
4.3in
color
6-7in
2015
x
x
x
x
x
9V-24V
x
2-hr +
x
x
x
x
x
x
wider range
~500 cubic in.
5-10lbs.
1m
color
>8in.
Features
Mediresp III
Worst Case
Mediresp IIII
Nominal
not shown
cycle screen
Displays Settings
BPM
blood oxygen level
pulse
pressure level
mode of operation
BPM setting
flow
CPR count
charge
Housing
CPR
Best Case
2015
all values shown
with moving
all values
displays and
shown
animations
shown with
having option to
controls and only values
customize
incremental shown on
all on same values shown on
displays
screen
all values shown
screen
screen
display on
default charge display on
screen with
graphic
LED
no indicator LED's via window screen
monitor
breaths set compressio
CPR audio
Audio and
with dial
ns
instructions
pictoral
beat count
CPAP
Alarms
LED and beep
LED and
beep
shape
material
square
metal
square
sheet metal
Data
LED and beep
panel deisgn
styrene
message on
screen
form fitted
w/ custom
mount
styrene
displayed so can
be recorded
no storage
SD or USB
x
audio/ visual
display
geometric
composite
internal storage
w/ Bluetooth
communication
MEDIRESP IIII- 2015
QUESTIONS