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