Pugh Chart

Design Objectives	Weight	Design Idea 1	Design Idea 2	Design Idea 3	Design Idea 4
Safety	9	++	Datum	+	-
Ease of use	5	+	Datum	+	-
Portability	4	-	Datum	-	--
Use of standard parts	6	+	Datum	+	-
Cost	7	--	Datum	-	++
+ SCORE		29	0	20	14
- SCORE		18	0	11	18
Total		11	0	9	-4

Justification

Design 1

Sl no	Objectives	Score	Justification
1	Safety	+18	Controlled movement ensures safety than datum
2	Ease of use	+5	The three motors make it easy for precise patterns
3	Portablity	-4	It occupies more space
4	Use of standard parts	+6	Compared to datum parts are more standard
5	Cost	-14	This costs more than datum

Design 2

Sl no	Objectives	Score	Justification
1	Safety	0
2	Ease of use	0
3	Portablity	0
4	Use of standard parts	0
5	Cost	0

Design 3

Sl no	Objectives	Score	Justification
1	Safety	+9	Robotic arm provides more controlled movement
2	Ease of use	+5	Movements by robotic arm is more precise than datum
3	Portablity	-4	Less portable due to heavy parts
4	Use of standard parts	+6	All parts used are standard as compared to datum
5	Cost	-7	This costs much more than datum

Design 4

Sl no	Objectives	Score	Justification
1	Safety	-9	Delicate parts are used
2	Ease of use	-5	Difficult to use than datum
3	Portablity	-8	Complicated parts make it less portable
4	Use of standard parts	+6	Compared to datum parts are more standard
5	Cost	+14	Costs more due to complicated parts

The Best design is Design 1

Final Concept

Product Architecture

Function clustering

Sub Systems Identified

1. Input Unit
2. Initializing Unit
3. Drawing Unit
4. Interface Unit

Interaction Details

Input Section	Initializing Section	Drawing Section	Interface Section
Spatial	NO	YES	NO
Data	YES	YES	NO
Material	NO	NO	NO

Initializing Section	Input Section	Drawing Section	Interface Section
Spatial	NO	YES	NO
Data	YES	YES	NO
Material	NO	NO	NO

Drawing Section	Input Section	Initializing Section	Interface Section
Spatial	NO	YES	NO
Data	YES	YES	YES
Material	NO	NO	NO

Interface Section	Input Section	Initializing Section	Drawing Section
Spatial	NO	NO	NO
Data	NO	NO	YES
Material	NO	NO	NO