Weightage for objectives

Objectives	Weightage
Automatic	10
Potable	8
Rugged	6
User friendly	4

PUGH Chart

Objectives	Design Idea 1	Design Idea 2	Design 3	Design Idea 4
Automatic	0	0	Datum	0
Portable	++	-	Datum	-
Rugged	+	++	Datum	++
User friendly	++	+	Datum	-
+Score	30	16	Datum	12
-Score	0	8	Datum	8
Total	30	8	--	4

The best concept selected is : "Design Idea.1".

Justification:

Design idea no.	Objective	Score given	Justification
1	Automatic	0	Device is automatically operated.
	Portable	16	Easy to be carried and quick installation
	Rugged	6	Rugged in Nature
	User-friendly	8	Easy to use because of its remote access and battery operated
2	Automatic	0	device is Automatically operated
	Portable	-8	Not easily portable because belt system cannot be replaced frequently
	Rugged	12	More Rugged in Nature as belt is durable and there is chance of sliping of belt from the shaft
	User friendly	4	Bit easier to use
3	Automatic	Datum
	Portable	Datum
	Rugged	Datum
	User friendly	Datum
4	Automatic	0	Device is Automatically operated
	Portable	-8	Not easily Portable because setting up a device is difficult
	Rugged	12	much more Rugged in Nature than required because of use lead screw mechanism
	User friendly	-4	it is not user-friendly as it produces noise

Selected design

Clustering of sub-functions in to subsystem

List of Functions Sub Functions

1.Indicators.

a.indication of power supply.

2.Task completion.

a.cleans the white board.

3.Speed controller.

a. Arduino control.

5.Remote access.

a.Remote control.

b.Bluetooth control.

Component hierarchy v/s Function tree

System interactions

Material interactions

solids,liquids and gases that flow from one subsystem to another.

Energy interactions

Energies that must be transmitted or shielded between sub systems.

Data interactions

signals(beep,blink etc)that must be processed from one sub system to another.

Spartial arrangements

geometrical dimenstions,degrees of freedom,tolerance,and constraints that must be maintained between sub systems.

System interaction chart

power supply

Interactions	system process	task completion
Data interactions	1	1
Energy interactions	1	0
Material interactions	1	1

system process

interactions	power supply	task completion
Data interactions	1	1
energy interaction	1	0
Material interaction	0	1

task completion

interactions	power supply	system process
Data interactions	1	1
energy interaction	0	1
Material interaction	0	1