Weightages to Objectives

Sl.no	Objectives	Weights
1	Safety	8
2	Ease to use	6
3	Space	5
4	Loading mechanism	7
5	Attachment of standard parts	6
6	Cost	5

Pugh Chart

Design Objectives	Weights	Design 1	Design 2	Design 3	Design 4
Safety	8	Datum	-	-	-
Ease to use	6	Datum	-	+	-
Space	5	Datum	-	+	+
Loading mechanism	7	Datum	+	-	-
Attachment of standard parts	6	Datum	+	-	-
Cost	5	Datum	+	-	-
Score(+)			18	11	5
Score(-)			-19	-26	-38
Total			-1	-15	-33

Justification

Design NO.	Objectives	Score Allocation	Justification for the Scores
1	Safety	0
	Ease to use	0
	Space	0
	Loading mechanism	0
	Attachment of standard parts	0
	Cost	0

Design NO.	Objectives	Score Allocation	Justification for the Scores
2	Safety	-8	We might hurt overselves
	Ease to use	-6	It is heavier compared to Datum
	Space	-5	It occupies more space
	Loading mechanism	+7	It loads efficiently
	Attachment of standard parts	+6	Since their is conveyer belt and dc motor work will be smoothly in progress
	Cost	+5	It is cost efficient

Design NO.	Objectives	Score Allocation	Justification for the Scores
3	Safety	-8	It may damage the petri plates due to fast mechanism
	Ease to use	+6	As it is lighter, it can be used easily
	Space	+5	The device is compact hence it occupies less space
	Loading mechanism	-7	Machine is tall and loading process depends on high voltage to pump media into petri plates
	Attachment of standard parts	-6	As the roller is used, due to fast rotation it may get damage
	Cost	-5	As modern tools are used the cost becomes more

Design NO.	Objectives	Score Allocation	Justification for the Scores
4	Safety	-8	Due to heavy materials machine may loss balance while loading
	Ease to use	-6	It is heavier
	Space	+5	Occupies less space
	Loading mechanism	-7	It does not load efficiently
	Attachment of standard parts	-6	Machine is tall and loading process depends on high voltage to pump media into petri plates
	Cost	-5	Due to modern tools and costly materials the cost of machine is inefficient

Final Selected Design Concept

Hence from the comparison of designs by Pugh chart, we would like to conclude that Design Concept 1 is more efficient in its loading mechanism, safety, user friendly, good in portability and cost efficient to the buyers. So, the design 1 is best for exploration design work. Where the client will be preferring our design for requirement for loading of media into petri plates.