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PUGH CHART

(I) Assign weights to the objectives

Design objectives	Weights
Cost	3
Installation	2
Safety	8
Ease of use	9
Maintenance	7
Space	4
Portability	6
Use of standard parts	5

(II) PUGH Chart for 4 alternative designs

Design objectives	Weights	Design 1	Design 2	Design 3	Design 4
Cost	3	-	datum	0	0
Installation	2	-	datum	+	-
Safety	8	0	datum	0	0
Ease of use	9	+	datum	--	-
Maintenance	7	-	datum	+	-
Space	4	-	datum	-	+
Portability	6	+	datum	-	-
Use of standard parts	5	++	datum	-	-
Score(+)		25	0	9	4
Score(-)		16	0	33	29
TOTAL		+9	0	-24	-25

5.1 Justification for score given

Design No	Objective	Score allocated	Justification for the score
1	Cost	-3	Requires Arduino and some other expensive items
	Installation	-2	Installation process is difficult compared to other designs
	Safety	0	The machine for this design is user friendly and non-hazardous
	Portability	+6	As this design has appropriate dimensions and weight, it's easy to port
	Ease of use	+9	The mechanism of this design provide an ordered sorting of coins
	Use of standard parts	+10	It has Arduino,LCD,Resistors and some other better electronic equipments which maintain the standard of the machine
2	Cost	0	This design is taken as a reference
	Installation	0	This design is taken as a reference
	Safety	0	This design is taken as a reference
	Portability	0	This design is taken as a reference
	Ease of use	0	This design is taken as a reference
	Use of standard parts	0	This design is taken as a reference
3	Cost	0	Less expensive when compared to other designs as works on simple rotary mechanism
	Installation	+2	Easy to install as it's a simple model
	Safety	0	The machine for this design is user friendly and non-hazardous
	Portability	-6	Doesn't satisfy the weight constraint, hence difficult to port
	Ease of use	-18	The coins maybe disordered due to the rotation process
	Use of standard parts	-5	No complex materials are needed
4	Cost	0	No expensive parts are used
	Installation	-2	As we have a vibrating motor used as a fan, the installation is difficult
	Safety	0	The machine for this design is user friendly and non-hazardous
	Portability	-6	Since it has a vibrating motor and other electronic equipments attached to it, it's difficult to port
	Ease of use	-9	The process of coin movement may stop if vibration process is improper
	Use of standard parts	-5	No complex materials are needed

5.2 Selected Design

By analyzing the PUGH chart, Design 1 is selected.

5.3 Product Architecture

5.4 Function Clustering

5.5 Interaction between subsystems