5.1 Pugh chart

Design Objectives	Weights	Design 1	Design 2	Design 3	Design 4
Size	9	+	Datum	+	-
Durability	3	0	Datum	0	-
Portability	4	++	Datum	-	0
Weight	7	+	Datum	--	++
Cost	5	0	Datum	-	+
Score(+)	.	24+	0	9+	19+
Score (-)	.	0	0	23-	12-
Total	.	24+	0	14-	7+

5.2 Justifications

no	Objective	Score Allocated	Justification for the Score
1	Size	9+	The motors are housed outside the body and hence safe to use
--	Portability	8+	Easier due to housed motor
--	Weight	7+	Light weight
--	Durability	0	Less damage to motors as they are not exposed
--	Cost	0	Affordable price
2	Size	Datum	Convenient size
--	Portability	Datum	It is portable
--	Weight	Datum	It is light weight
--	Durability	Datum	It is durable enough
--	Cost	Datum	It is less affordable
3	Size	9+	Safe due to curved edges of cylinder
--	Portability	4-	Hard to move as it is heavy
--	weight	14-	Heavy weight due to wooden platform
--	Durability	0	Very durable
--	Cost	5-	Very costly because of wood
4	Size	9-	Less safe due to sharp edges
--	Portability	0	It is portable
--	Weight	14+	Lighter in weight
--	Durability	3-	Less durable due to use of shafts
--	Cost	5+	Cheaper

5.3 Selected design

5.4 Product Architecture

5.4.1 Function Clustering

5.4.2 Subsystem list

Activity 2.2 : Subsystem List

SL. No.	Subsystem
1	Arm movement
2	Waist movement
3	Additional Features
4	Input unit

5.4.3 Interaction between subsystems

Subsystem 1	Subsystem 2	Subsystem 3	Subsystem 4
Spatial	yes	-	-
Data	-	yes	yes
Material
Subsystem 2	Subsystem 1	Subsystem 3	Subsystem 4
Spatial	yes	yes	yes
Data	-	yes	yes
Material
Subsystem 3	Subsystem 1	Subsystem 4	Subsystem 2
Spatial	-	-	yes
Data	-	yes	yes
Material
Subsystem 4	Subsystem 1	Subsystem 3	Subsystem 2
Spatial	-	yes	-
Data	-	yes	yes
Material