4.1 Assign weights to the objective

SI.NO	Objective	weight
1.	Portability	7
2.	Safe to use	9
3.	Easy to use	5
4.	Interactiveness	6
5.	Cost	8

4.2 Pugh chart

  Task 2:Write Pugh chart for the 4 alternative designs shown in figures

Design objectives	Weights	Design 1	Design 2	Design 3	Design 4
Portability	7	"++ "	Datum	"--"	"--"
Safety	9	"++"	Datum	"++"	"++"
Easy to use	5	"+"	Datum	"++"	"++"
Interactiveness	6	"+"	Datum	"+"	"--"
Cost	8	"+"	Datum	"-"	"--"
Score(+)		51	0	34	28
Score(-)		0	0	22	44
Total		51	0	12	-16

4.3 Justification for the scores given

Design No.	Objective	Score Allocated	Justification for the Score.
1	Portability	14	It is highly portable.
	Safety	18	It is much safer as it requires no human contact
	Easy to use	5	The model has easy access to operate with phone and remote
	Interactiveness	6	It is highly interactive
	Cost	8	It has a reasonable price according to its function
2	Portability	Datum	-
	Salety	Datum	-
	Easy to use	Datum	-
	Interactiveness	Datum	-
	Cost	Datum	-
3	Portability	-14	It cannot be moved
	Safety	18	The model is safe as it requires no human contact
	Easy to use	10	The model is operated by machines
	Interactiveness	6	It is interactive
	Cost	-8	It is costly
4	Portability	-14	It cannot be moved
	Safety	18	The model is safe as it requires no human contact
	Easy to use	10	The model is operated by machines
	Interactiveness	-12	Not at all interactive
	Cost	-16	Exceeds the budget

#Selected design: Automaton Guitarist and Dancing girl

4.4 Function clustering

4.5 Subsystem list.

Sl no	Subsystem
1	User put
2	Indication
3	Dancing
4	Playing music

4.6 Interaction details.

User input	Indication	Dancing	Playing music
Spatial	No	Yes	Yes
Data	Yes	No	Yes
Material	Yes	No	Yes

Indication	Dancing	Playing music	User input
Spatial	No	No	No
Data	No	Yes	Yes
Material	No	Yes	Yes

Dancing	Playing music	User input	Indication
Spatial	Yes	Yes	No
Data	Yes	Yes	Yes
Material	No	No	No

Playing music	user input	Indication	Dancing
Spatial	Yes	No	Yes
Data	Yes	Yes	Yes
Material	No	No	No