4.Concept Selection and product architecture - P-division-2020-2021-even/Repo-11 GitHub Wiki

4.1 Identified and prioritised objectives

1.reliability

2.Ease of use

3.Portability

4.Use of standard parts

5.Cost

weightage assessment

objectives	weightage
reliability	9
easy of use	8
portability	7
use of standards	6
cost	8

4.2 PUGH CHART

objectives	weightage	design 1	design 2	design 3	design 4
reliability	9	+	datum	0	+
Ease of use	8	+	datum	0	+
portability	7	++	datum	+	-
cost	8	-	datum	+	+
+score		31	datum	15	25
-score		-8	datum	0	-7
total		23	datum	15	18

4.3 Justification for marks given to the designs

design number	obejective	score alloted	justification for score allocated
1	reliability	9	design 1 is more reliable than the datum because of the the circuit and the model is efficient here
	portability	14	design 1 has wheels for portability than datum, which are very useful.
	ease of use	8	design 1 is more user friendly than datum because of the material used in it is very good and it is very small than datum which makes it easy to use.
	cost	-8	design 1 is more costlier than datum because of the circuit and the plastic by which it is made.

design number	obejective	score alloted	justification for score allocated
2	reliability	0	datum
	portability	0	datum
	ease of use	0	datum
	cost	0	datum

design number	obejective	score alloted	justification for score allocated
3	reliability	0	design 3 has same reliability as datum
	portability	0	it is has same level of portability as the datum
	ease of use	7	design 3 has more comfortable design to use and control than datum
	cost	8	design 3 can also be made cheaply because of the material used in it

design number	obejective	score alloted	justification for score allocated
4	reliability	9	design 4 is more reliable due to its working model and the circuit is closed inside which makes it more reliable
	portability	-7	design 4 is less portabile due the size of the model
	ease of use	8	it can be easy used compared to datum ,which is small
	cost	8	yeah this can be made with cheap material with good quality

4.4 SELECTED DESIGN

4.5 Function clustering

4.6 Sub-systems :-

Sl.No	sub-systems
1	portability unit
2	drawing unit
3	pen adjusting unit

4.7 interaction between subsystem

pen adjusting unit	portability unit	drawing unit
Material interaction	yes	yes
Data Interaction	yes	yes
Spatial interaction	no	yes

portability unit	drawing unit	pen adjusting unit
Material interaction	yes	yes
Data Interaction	no	yes
Spatial interaction	yes	yes

drawing unit	portability unit	pen adjusting unit
Material interaction	no	yes
Data Interaction	no	yes
Spatial interaction	yes	yes