5.1 JUSTIFICATIONS FOR SCORE GIVEN
| Objectives |
Weights |
| Safety |
9 |
| Ease of use |
6 |
| Portability |
4 |
| Use of standard parts |
7 |
| Cost |
5 |
Pugh Chart
| Design Objectives |
Weights |
Design 1 |
Design 2 |
Design 3 |
Design 4 |
Design 5 |
| Safety |
9 |
--- |
+ |
Datum |
++ |
-- |
| Ease of use |
6 |
++ |
- |
Datum |
+++ |
-- |
| Portability |
4 |
-- |
-- |
Datum |
++ |
-- |
| Use of standard parts |
7 |
+ |
+ |
Datum |
- |
-- |
| Cost |
5 |
-- |
--- |
Datum |
+ |
-- |
| Score(+) |
|
19 |
16 |
|
49 |
0 |
| Score (-) |
|
-63 |
-29 |
|
-7 |
-62 |
| Total |
31 |
-44 |
-13 |
|
42 |
-62 |
Justification for Score Assigned
| Design No. |
Objective |
Score Allocated |
Justification for the Score |
| 1 |
Power consumption |
-- |
As it has to many moving parts. |
|
Ease of Use |
++ |
Only needs one senser |
|
Portability |
- |
To heavy |
|
Maintenance |
-- |
many parts need to be removed to work with machine |
|
Cost |
+ |
less materials required. |
| 2 |
Power consumption |
-- |
As it uses a hydraulic cylinder |
|
Ease of Use |
- |
Hydraulic system are relatively difficult to work with |
|
Portability |
-- |
Hydraulic system are very heavy |
|
Maintenance |
+ |
hydraulic system require less Maintenance |
|
Cost |
--- |
hydraulic are very costly |
| 3 |
Power consumption |
+ |
Directly driven by electricity |
|
Ease of Use |
+ |
It has linear actuator |
|
Portability |
- |
Design is quite big |
|
Maintenance |
+ |
low maintenance |
|
Cost |
-- |
it uses reaberi pie and linear actuator |
| 4 |
Power consumption |
++ |
Directly driven by electricity |
|
Ease of Use |
+++ |
It has a simple mechanism |
|
Portability |
++ |
relatively light and small |
|
Maintenance |
- |
Conveyer belt needs regular replacement |
|
Cost |
+ |
Use of ready available parts and and less materials need to build. |
| 5 |
Power consumption |
-- |
Design not viable |
|
Ease of Use |
-- |
Design not viable |
|
Portability |
-- |
Design not viable |
|
Maintenance |
-- |
Design not viable |
|
Cost |
-- |
Design not viable |
SUBSYSTEM
| Sl no |
Subsystem |
| 1 |
Crushing Unit |
| 2 |
Sensing Unit |
| 3 |
Storage Unit |
| 4 |
Casing Unit |
5.5 INTERACTION BETWEEN SUBSYSTEMS
| Sl no |
Subsystem |
| 1 |
Crushing Unit |
| 2 |
Sensing Unit |
| 3 |
Storage Unit |
| 4 |
Casing Unit |
| Crushing Unit |
Subsystem 2 |
Subsystem 3 |
Subsystem 4 |
| Saptial |
NO |
Yes |
Yes |
| Data |
Yes |
Yes |
Yes |
| Material |
NO |
Yes |
Yes |
| |
|
|
|
| |
|
|
|
| Sensing Unit |
Subsystem 2 |
Subsystem 3 |
Subsystem 4 |
| Saptial |
No |
Yes |
Yes |
| Data |
Yes |
Yes |
Yes |
| Material |
Yes |
Yes |
Yes |
| |
|
|
|
| Storage Unit |
Subsystem 2 |
Subsystem 3 |
Subsystem 4 |
| Saptial |
Yes |
Yes |
Yes |
| Data |
Yes |
Yes |
Yes |
| Material |
Yes |
Yes |
Yes |
| |
|
|
|
| Casing Unit |
Subsystem 2 |
Subsystem 3 |
Subsystem 4 |
| Saptial |
Yes |
Yes |
Yes |
| Data |
Yes |
Yes |
Yes |
| Material |
Yes |
Yes |
Yes |