PUGH CHART

Design Objectives	Weights	Design 1	Design 2	Design 3	Design 4
Safety	9	-	+	DATUM	0
Ease of use	7	-	0	DATUM	0
Portability	5	-	+	DATUM	+
Use of standard parts	6	+	-	DATUM	+
Cost	6	+	-	DATUM	+ +
Score(+)		12	14	0	28
Score (-)		-21	12	0	0
Total		-9	2	0	28

justification for score given

Design No.	Objective	Score Allocated	Justification for the Score
1	safety	-9	spring hits back
	Ease of Use	-7	one guide is required to compress the spring and the other is required to remove the can
	Portability	-5	size is larger
	Use of Standard Parts	6	relatively standard parts
	Cost	6	moderate cost to manufacture it
2	Safety	9	relatively safe
	Ease of Use	0	require alot of pressure from the foot
	Portability	5	can be carried to places but might be heavy
	Use of Standard Parts	-6	some customization is required for the dimensions of the spring
	Cost	-6	because of customization and parts being not readily available
3	Safety	0	used as a reference design
	Ease of Use	0	used as a reference design
	Portability	0	used as a reference design
	Use of Standard Parts	0	used as a reference design
	Cost	0	used as a reference design
4	Safety	0	safe to handle by arms
	Ease of Use	0	easy to handle by arms rather than legs
	Portability	5	small in size thus it is easy to carry
	Use of Standard Parts	6	all the parts are readly available like lever ,bolts,and nuts
	Cost	12	affordable cost

function clustering

Interaction between subsystem

SL. No.	Subsystem
1	Motion control system
2	Perception system
3	Energy supply system

interaction details

Subsystem 1	Subsystem 2	Subsystem 3
Spatial	Yes	Yes
Data	Yes	No
Material	Yes	Yes
Subsystem 2	Subsystem 2	Subsystem 3
Spatial	Yes	Yes
Data	Yes	No
Material	Yes	Yes
Subsystem 3	Subsystem 1	Subsystem 2
Spatial	Yes	Yes
Data	No	No
Material	Yes	Yes