1. Multipurpose Duster with Wetting Technology
Concurrent Engineering in Aerospace System
(MECH6941)
Presented To,
Dr. Ashok Kaushal
Presented by,
Group # 3
Asmita Dubey 9796924
Charanpreet Singh Heer 6420753
Dushyant Patel 6940595
Gurpreet Bhatoa 1951645
Rajan Desai 1237225

2. Project Overview
• Introduction
• Mission Statement
• Market Analysis
• Survey Interpretation
• Establishing Target specifications
• Preliminary Design
• Concept Generation
• Concept Selection
• Final Design
• Cost analysis of duster
• Design for assembly
• Payback analysis
• Supply chain model
• Review and Progress
• Conclusion
• Future growth

3. Introduction
• Dusters are well known for cleaning black and
white boards
• Main end users are universities, collages,
schools, coaching classes etc…
• Available in different models with different
features.
• Price generally varies from $1- $ 5.
Peelable Duster
Duster with marker
holder
Duster with vacuum
pump

4. Mission Statement
LIGHT WEIGHT MULTIPURPOSE DUSTER WITH WETTING TECHNOLOGY
Product Description Secondary Market
Exchangeable wet cleaning pad, Coaching classes
Chalk holder Domestic
Marker holder Office departments (meetings)
Aesthetic in look Distributors and resellers
Light weight
Assumptions and Constraints
Key Business Goals
New exchangeable cleaning pad with wetting technology
Serve effectively Environmental friendly
Initially to cover 40%-60% market
First product introduction 1stQ 2013 Stakeholders
Customer satisfaction
Primary Market
End users (e.g. Professors, Teaching Assistant’s)
Universities, Schools, Coaching Classes etc.
Universities
Manufacturing operations
Collages
Schools

5. Market Analysis
 Online Survey
 Group Discussion
 One to one Interview

8. Survey Interpretation
Customer Need Statement Customer Need Interpretation
It’s plastic body strength Duster can be sturdy
If I were given a chance to change something in a duster, I Duster can be used for both black and white board
would like to use a material so that it can work equally well
for both white and black boards.
Holding material Duster can be hold easily
The dusters currently being used does not absorb chalk Duster can absorb the dust
dusts; the dusts fly out in the air and sticks to hands. It
causes breathing and cleanliness problems. So dusters should
be able to grasp the dust it is designed for
Price Duster can be affordable
Appearance Duster can maintain aesthetic look
Size will be pocket size, some wetting agent to not leave Duster can be compact and clean properly
impression on board
Color Duster is good looking
I would have put a handle on it. Duster can be hold easily and firmly
Provide a better cleaning besides spreading chalk Duster can clean properly
The cleaning efficiency Duster can clean properly
Not about duster. But I prefer to have a color chalk, it would Duster can hold the chalk
be helpful specially when I want to draw diagram for student
I would want a wet duster Duster can absorb the dust and clean properly
After cleaning the blackboards, it remains a bit whitish; it Duster can erase properly
would be great if this whiteness can be removed
Better grip durable Duster can be long lasting

9. Establishing Target specifications
• List of Matrices
Metrics No. Need Nos. Metric Imp. Units
1 1 Min. value from tension and compression strength test 3 Pa
2 2,9,11 Dust absorbing capacity of cleaning pad material 5 Lb.
3 3,6,9,11 Cleaning pad life cycle 2 Hrs.
4 4 Unit manufacturing cost 4 $
5 4 Import cost 3 $
6 8 Total weight 4 gm
7 6 Final dimensions 5 Mm
8 5,7 CAD Design tool used 3 list
9 2,9 Spring Tension 2 N
10 5,7 Aesthetic look 3 Subj.
11 8 Fine holding grip design 4 list
12 8 Type of material used 4 list
13 10 Number Chalk holding capacity 2 Numbers
14 10 Number of Markers holding capacity 2 Numbers
15 12 Duster life cycle 3 Hrs.

10. The needs-
metrics matrix.

11. • Competitive Bench Marking
Metric Need Metric Imp. Units Art line Peel-able Sure mark Acme Lega master
s No. Nos. United
1 1 Min. value from tension 2 Pa NA NA NA NA NA
and compression strength
test
2 2,9,11 Dust absorbing capacity of 5 Subj. 3 3 2 4 4
cleaning pad material
3 3,6,9, 11 Cleaning pad life cycle 2 Hrs. NDA NDA NDA NDA NDA
4 4 Unit manufacturing cost 4 $ 2.5 6.13 3 3.7 33
5 4 Import cost 3 $ NDA NDA NDA NDA NDA
6 8 Total weight 4 gm 190 217 210 180 277
7 6 Final dimensions 5 DxHxW mm 109×117×45 145 x 35 x 55 100 x 55 x 45 109×117×45 174 x 80 x 98

12. • Competitive Bench Marking
Metrics Need Nos. Metric Imp. Units Art line Peel-able Suremark Acme United Lega-
No. master
8 5,7 CAD Design tool used 3 list NDA NDA NDA NDA NDA
9 2,9 Spring Tension 2 N NA NA NA NA NA
10 5,7 Aesthetic look 3 Subj. 3 2 3 3 4
11 8 Fine holding grip design 4 Subj. 2 3 2 2 3
12 8 Type of material used 4 list Plastic Plastic Plastic Wood Plastic
13 10 Number Chalk holding 2 Numbers 0 0 0 0 0
capacity
14 10 Number of Markers 2 Numbers 0 1 0 0 4
holding capacity
15 12 Duster life cycle 3 Hrs NDA NDA NDA NDA NDA

13. Target Specifications
S. No. Metrics Units Marginal value Ideal Value
1 Dust absorbing capacity of cleaning pad Subj. 3-5 5
material
2 Cleaning pad life cycle Hrs. 40 - 60 >60
3 Unit manufacturing cost $ 2.5 - 6.13 <2.5
4 Total weight gm 190 - 277 <250
5 Final dimensions D mm 109 - 174 120-150
W mm 80 - 117 60-80
H mm 45 - 98 50-60
6 Number Chalk holding capacity Numbers 2-4 4
7 Number of Markers holding capacity Numbers 1-2 2

14. Preliminary Design
• Concept Generation
Functional Analysis

15. Decomposing problems into subsystems

16. Concept Selection
Preliminary Sketch

17. Concepts
• For Wetting System Box
• Spray nozzle type wetting
system
• Spring Actuated Sponge
wetting
• Diaphragm Actuated
Sponge wetting

18. • For Cover
• Hinged
• Sliding
• Snap Fit

19. Concept Screening
Concepts
Wetting System Cover
Selection Criteria Spray Spring Diaphragm Hinged cover Sliding cover Snap-fit
nozzle Actuated actuated cover
Sponge Sponge
wetting Wetting
Ease of Handling + + + + + +
Ease of use - + - + + +
Durability + + - - - +
Ease of Manufacturing - + + - + +
Ease of assembly + - - - + +
Sum +’s 3 4 2 2 4 5
Sum 0’s 0 0 0 0 0 0
Sum –‘s 2 1 3 3 1 0
Net Score 1 3 -1 -1 3 5
Rank 2 1 3 3 2 1
Continue? Yes Yes No No Yes Yes

20. Concept Rating on weightage
Concept
Wetting System Cover
Spray nozzle Spring Actuated Sliding cover Snap-fit cover
Sponge wetting
Selection Criteria Weight Ratin Weighted Rating Weighted Rating Weighted Rating Weighted
g Score Score Score Score
Ease of Handling 15% 3 0.45 4 0.60 3 0.45 4 0.60
Ease of use 25% 3 0.75 4 1.00 4 1.00 3 0.75
Durability 15% 4 0.60 3 0.45 2 0.30 4 0.60
Ease of Manufacturing 20% 2 0.40 4 0.80 3 0.60 3 0.60
Ease of assembly 25% 4 1.00 3 0.75 4 0.80 4 1.00
Total 3.2 3.6 3.15 3.55
Score
Rank 2 1 2 1
Continu No Develop No Develop
e

21. Final Design Specifications of Final Values
Design
Weight 0.247kg
Dimension’s
L 120mm
B 65mm
H 50mm
Number of Markers 1
Holding Capacity
Number of Chalks Holding 4
Capacity
Wetting Technology Spring Actuated sponge
Cover Snap-fit Cover
Cost to Customer $ 3.00

22. Cost analysis
Components Price Cost per piece
Plastic components $0.17/lb. $0.1037
Cost of Duster Cap (rubber ) $0.025/ piece $0.025
Velcro $25.50(1”*25yd ) $0.076
Sponge $5.25/lot(1”*1m*5m) $0.01
Cleaning pad (synthetic felt) $5.50/yd. $0.044
Total $0.2549
Components Cost per piece
Fixed and variable
Manufacturing and machining (injection molding ) $0.75
cost Import cost ($50000 shipment) [10] $0.20
Labor cost $0.054
Building and electricity $0.045
Miscellaneous $0.50
Total $1.549
Total cost of duster to us Total cost to Customer
= Cost of duster + Fixed and variable cost = 3.00 (including our margin)
= 0.2549 + 1.549
= $1.81 /piece

23. Design For Assembly
Assembly Time
Assembly Time Estimation
Overall Handling/ Insertion/ Fitting time in seconds
(Manual Operation)
Part Name Min Max. Avg.
Base 2 4 3
Wetting System box 9 14 10.5
Sponge 2 4 3
Spring 7.8 42 24.9
Shell Plate 4 8 6
Cleaning Pad 3 8 5.5
Cap/Lock for wetting system 2 4 3
Cover 3.5 8 5.9
Total 33.3 92 61.8

24. PAYBACK ANALYSIS
Fixed cost = 50000+10000
= 60000$
Variable cost =7000 + 8000+5000
= 20,000$
Cash in hand = 20,000$
Payback =800000/3.00 (selling cost of duster per piece 3.00)
= 26667 pieces
*We need to sell 26667 pieces to recover our initial investment

25. Multipurpose Duster with Wetting Technology supply chain model

26. CONCLUSIONS
• Introduction of wetting technology.
• capable of holding markers and chalks.
• Best concept was chosen after comparing them with existing products on the basis of selection
criteria like manufacturing cost, material cost, product weight and customer needs importance.
• After selecting the concept, through cost model final specifications were planned.
• All the parts from the suppliers from other countries, efforts were made to design the
component as simple as possible and less in numbers.
• An approximate assembly time was calculated
• Finally, an estimation of the cost of product
• Overall, at the first look the product seems to attract enough customers because of its unique
features and a compatible price among its competitors. But there is always a chance to improve
the product by time to suit market needs.

27. FUTURE GROWTH
Further research can be performed on the improving the wetting technology system
better fluid for wetting technology
choice of material for the body parts
choice of material for the cleaning pad etc.
These factors can surely put significant effect in the growth of the product in the future.

28. Orders are open
Hurry up!!!
To book your duster