OBJECTIVES

1.Safety

2.Ease of use

3.Portability

4.Cost

5.Use of standard parts

Assigning Weightage for the stated Objectives

Objective	Weightage
Safety	9
Ease of use	8
Portability	7
Cost	6
Use of Standard parts	5

PUGH CHART

OBJECTIVES	WEIGHTAGE	DESIGN 1	DESIGN 2	DESIGN 3	DESIGN 4
Safety	9	+	-	Datum	9
Ease of use	8	-	++	Datum	0
Portability	7	-	+	Datum	+
Cost	6	--	++	Datum	+
Use of Standard parts	5	++	0	Datum	0
+ Score		19	35		22
- Score		27	9		0
Total		-8	26	0	22

The best design selected is -"Design 2"

JUSTIFICATION

DESIGN 1

OBJECTIVES	SCORE GIVEN	JUSTIFICATION
1.Safety	9	Most of the parts are sealed
2.Ease of use	-8	Refilling of the disc is difficult
3.Portability	-7	Heavy
4.Cost	-12	Expensive parts
5.Use of standard parts	10	More number of standard parts

DESIGN 2

OBJECTIVES	SCORE GIVEN	JUSTIFICATION
1.Safety	-9	parts are not sealed
2.Ease of use	16	Simple and effective mechanism
3.Portability	7	Light weight
4.Cost	12	Less requirements of parts
5.Use of standard parts	0	Less number of standard Parts

DESIGN 3

OBJECTIVES	SCORE GIVEN	JUSTIFICATION
1.Safety	-	Datum
2.Ease of use	-	Datum
3.Portability	-	Datum
4.Cost	-	Datum
5.Use of standard parts	-	Datum

DESIGN 4

OBJECTIVES	SCORE GIVEN	JUSTIFICATION
1.Safety	9	Machine is sealed
2.Ease of use	0	Complex slider mechanism
3.Portability	7	Easy to carry
4.Cost	6	Parts used are affordable
5.Use of standard parts	0	Simple parts are used

FLOW CHART

BILL OF MATERIAL

SL.NO	PART NAME	MATERIAL WITH WHICH THE PART IS MADE UP OF	SPECIFICATION OF THE PART	QUANTITY REQUIRED	FABRICATION PROCESS IF NEEDED
1	BASE	Acrylic sheet	20*20	1	cutting and finishing
2	DC Motor	-	12V,20 rpm	1	-
3	Half gear	Acrylic sheet	Teeth of 2cm	1	laser cutting
4	Rack gear	Acrylic sheet	Teeth of 2cm and length=6cm	1	Laser cutting
5	Disc	Foam board	Diameter=4cm	6-8
6	Nuts and bolts	-	25mm and 20mm	25mm=10 units ,20mm=10 units	-
7	Reservoir	Cardboard	Tough (10×15×20)cm	1	Cutting and bending
8	On/off button	-	switch
9	Servo motor	_	_	1	_
10	Disc pushing unit	Acrylic sheet	13cm long and 10cm wide	1	Laser cutting
11	Launching unit	Acrylic sheet	26cm long and 8cm width	1	Laser cutting
12	Angle changing part	Acrylic sheet	101010cm	1	laser cutting
13	Rubber band	-	-	2	-

CIRCUIT DIAGRAM