WEIGHTAGE ASSIGNMENT

Objectives	Weights
Safety	9
Ease of use	7
Portability	7
Use of standard parts	5
Cost	8

PUGH CHART

Objectives	Weights	DESIGN -1	DESIGN -2	DESIGN -3	DESIGN -4
Safety	9	Datum	0	-	-
Ease of use	7	Datum	+	+	+
Portability	7	Datum	0	0	0
Use of standard parts	5	Datum	+	0	+
Cost	8	Datum	-	+	0
+ Score		0	12	15	12
- Score		0	8	-9	-9
Total		0	4	6	3

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Justification for the scores given

DESIGN NO	Objective	Score Allocated	Justification for the Score
1	Safety	Datum	Safe to use
	Ease of use	Datum	Easy to use
	Portability	Datum	Portable
	Use of standard parts	Datum	Sensor used is not easily available
	Cost	Datum	Cost of ultrasonic sensor is high

DESIGN NO	Objective	Score Allocated	Justification for the Score
2	Safety	0	similar to the datum
	Ease of use	+	easy as there is a nob system
	Portability	0	similar to datum
	Use of standard parts	+	hall effect sensor
	Cost	-	high cost due to hall effect

DESIGN NO	Objective	Score Allocated	Justification for the Score
3	Safety	-	less safety because of open circuit
	Ease of use	+	easy because of nob handling
	Portability	0	similar to datum
	Use of standard parts	0	similar to datum
	Cost	+	less because usage of PIR sensor

DESIGN NO	Objective	Score Allocated	Justification for the Score
4	Safety	-	Less safety because of dc motor
	Ease of use	+	Its easy to use, Simpler in operation
	Portability	0	Similar to datum
	Use of standard parts	+	Usage of display
	Cost	0	Similar to datum

Selected Concept is Design 3

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Function cluster

Subsystem List

Sl.no	Subsystem
1	Wool storing Unit
2	Wool dispenser Unit
3	Wool winding Unit
4	Indication Unit

Interaction Details

Subsystem 1	Subsystem 2	Subsystem 3	Subsystem 4
Data	❌	✔	✔
Material	✔	✔	❌
Spatial	✔	❌	❌

Subsystem 2	Subsystem 1	Subsystem 3	Subsystem 4
Data	❌	✔	✔
Material	✔	✔	❌
Spatial	✔	✔	❌

Subsystem 3	Subsystem 1	Subsystem 2	Subsystem 4
Data	✔	✔	✔
Material	✔	✔	❌
Spatial	❌	✔	❌

Subsystem 4	Subsystem 1	Subsystem 2	Subsystem 3
Data	✔	✔	✔
Material	❌	❌	❌
Spatial	❌	✔	❌