PUGH CHART

DESIGN OBJECTIVES	WEIGHTS	DESIGN 1	DESIGN 2	DESIGN 3	DESIGN 4
Safety	9	0	0	D	-
Ease of use	8	+	+	D	-
Portability	10	+	+	D	+
Use of standard parts	7	-	+	D	+
Cost	7	+	-	D	--
Efficiency	10	+	++	D	+
Score(+)	0	35	45	0	27
Score (-)	0	7	7	0	31
Total	0	28	38	0	-4

PRIORITIES ARE EXPRESSED IN TERMS OF WEIGHTSK WHICH ARE ASSIGNED TO OBJECTIVES

Objectives	Weights
Safety	9
Ease of use	8
Portability	10
Use of standard parts	7
Cost	7
Efficiency	10

5.1 JUSTIFICATIONS FOR SCORE GIVEN

Design Objectives	Weights	Design 1	Design 2	Design 3 (datum)	Design 4
Safety	9	Equally safe	Equally safe	Datum	Equally safe
Ease of use	8	Easy as it doesn’t contains any difficult mechanism	Easy as it doesn’t contain any difficult mechanism	Datum	Use of gears and complex mechanism and high power supply is needed
Portability	10	Lighter and easier to move	Lighter and easier to move	Datum	Lighter and easier to move
Use of standard parts	7	Simple parts are used and easily available	Tilters and tipping's are used	Datum	Gears and belts are used
Cost	7	Less costlier as it is a simple model	Complexions make it costlier	Datum	Gears and mechanisms make it costlier
Efficiency	10	Works simple	Works better as it involves more qualities	Datum	Works good but much power is needed
Total	0	28 Being a good score but not better than design 2. Thus rejected	38 is the highest score with good working is finalized	0	-4 Being negative this model is rejected

5.2 SELECTED DESIGN

5.3 PRODUCT ARCHITECTURE

5.4 FUNCTION CLUSTERING

5.5 INTERACTION BETWEEN SUBSYSTEMS

A) SUBSYSTEM

S.NO	SUBSYSTEM
01	Accepting marbles
02	Continuous movement
03	Chain

B) SUBSYSTEM INTERACTION

ACCEPTING MARBLES	CONTINUOUS MOVEMENT	CHAIN
SPATIAL	yes	no
DATA	no	yes
MATERIAL	yes	yes

CONTINUOUS MOVEMENT	CHAIN	ACCEPTING MARBLES
SPATIAL	no	yes
DATA	yes	no
MATERIAL	yes	yes

CHAIN	ACCEPTING MARBLES	CONTINUOUS MOVEMENT
SPATIAL	no	no
DATA	yes	yes
MATERIAL	yes	yes