Objectives

OBJECTIVES	WEIGHTS
SAFETY	08
USER FRIENDLY	09
USE OF STANDARD PARTS	07
COST	06

Pugh Chart

DESIGN OBJECTIVES	WEIGHTS	DESIGN 1	DESIGN 2	DESIGN 3	DESIGN 4	DESIGN 5
SAFETY	08	-	-	+	datum	0
USER FRIENDLY	09	0	-	+	datum	+
USE OF STANDARD PARTS	07	-	+	-	datum	0
COST	06	+	-	-	datum	+
SCORE(+)		6	7	17	0	15
SCORE(-)		-15	-23	-13	0	0
TOTAL		-9	-16	4	0	15

Justification of design 01 with respect to datum

OBJECTIVES	SCORE GIVEN WITH DATUM REFERENCE	JUSTIFICATION
SAFETY	-	There is high chance of detaching wheels from the track
USER FRIENDLY	0	The model is easy to use as datum
USE OF STANDARD PARTS	-	All parts are replaceable
COST	+	The model costs less as compared to datum

Justification of design 2 with respect to datum

OBJECTIVES	SCORE GIVEN WITH DATUM REFERENCE	JUSTIFICATION
SAFETY	-	There is high risk of breaking of window
USER FRIENDLY	-	Very difficult to operate
USE OF STANDARD PARTS	+	All the materials can be replaced
COST	-	Compared to datum, its more expensive

Justification of design 3 with respect to datum

OBJECTIVES	SCORE GIVEN WITH DATUM REFERENCE	JUSTIFICATION
SAFETY	+	More safer than datum
USER FRIENDLY	+	more easier to operate than datum
USE OF STANDARD PARTS	-	Parts are difficult to replace
COST	-	Very expensive compared to datum

Justification of design 5 with respect to datum

OBJECTIVES	SCORE GIVEN WITH DATUM REFERENCE	JUSTIFICATION
SAFETY	0	datum
USER FRIENDLY	+	easier to operate than datum
USE OF STANDARD PARTS	0	As same as datum
COST	+	less expensive compared to datum

Selected design

Functional clustering

Subsystems Identified

1.Sensing unit

2.Intimating unit

3.Closing unit Opening unit

4.Indicating unit

Interaction between subsystems

Sensing unit	Intimating unit	Opening/closing unit	Indicating unit
SPATIAL	yes	yes	yes
DATA	no	no	yes
MATERIAL	yes	no	no

Intimating unit	Sensing unit	Opening/closing unit	Indicating unit
SPATIAL	yes	yes	no
DATA	no	no	yes
MATERIAL	yes	yes	no

Opening/closing unit	Sensing unit	Intimating unit	Indicating unit
SPATIAL	yes	yes	no
DATA	no	no	yes
MATERIAL	no	yes	no

Indicating unit	Sensing unit	Intimating unit	Opening/closing unit
SPATIAL	no	no	no
DATA	yes	yes	yes
MATERIAL	no	no	no