Weightage for the stated objectives out of ten

Sr. No	objectives	weightage
1	Semi-automatic	6
2	Naturefriendly	9
3	Portable	8
4	Wrapping the chocolate	10
5	Cost	7

Designs

design no 1

design no 2

design no 3

Pugh chart

objectives	design idea 1	design idea 2	design idea 3	design idea 4
Semi-automatic	Datum	+	+	+
Naturefriendly	Datum	--	++	++
Portable	Datum	+	+	+
Wrapping the chocolate	Datum	+	-	+
cost	Datum	+	+	-
+score	0	31	39	42
-score	0	-18	-10	-7
Total	0	13	29	35

Justification

Design No	Objectives	Score given	Justification
1	DATUM	DATUM	DATUM
2	SEMI-AUTOMATIC	6	chocolates are inserted manually
2	NATUREFRIENDLY	-18	chocolates are wrapped by plastic
2	PORTABLE	8	it can be easily moved from one place to another
2	WRAPPING THE CHOCOLATES	10	wrapping is done by sealing the ends of chocolates through heating
2	COST	7	machine runs by batteries
3	SEMI-AUTOMATIC	6	chocolates are inserted manually
3	NATUREFRIENDLY	18	aluminium foil is used for wrapping
3	PORTABLE	8	it can be easily moved from one place to another
3	WRAPPING THE CHOCOLATES	-10	wrapping is done by glue ,if glue leaks then the chocolates get a bad taste
3	COST	7	machine is run by electricity
4	SEMI-AUTOMATIC	6	chocolates are inserted manually
4	NATUREFRIENDLY	18	aluminium foil is used for wrapping
4	PORTABLE	8	it can be easily moved from one place to another
4	WRAPPING THE CHOCOLATES	10	wrapping is done by sealing the ends of chocolates through heating
4	COST	-7	machine runs by electricity ,thus it increases the cost by heating

Selected design

Function tree

Identified list of sub systems

1. Sensing
2. Wrapping
3. Sealing
4. Indication of storage full

Functional tree v/s Component hierarchy

System interaction table

Sr.no	User interaction	System behavior
1	Switching on machine	conveyor belt starts rotating
2	Giving the input by manually	accepting the input
3	-------	sensing the chocolate by lights turning on and beep sound
4	-------	wrapping the chocolate
5	-------	cutting the partially wrapped chocolates
6	-------	sealing the chocolates
7	-------	wrapped chocolates are passed into the storage unit
8	-------	indicating that storage unit is full by beep sound
9	collecting the wrapped chocolates	cycle continues