| 1 |
Safety |
+ |
The machine has a covered drum that helps reduce direct contact with waste and moving parts. |
|
Ease of user |
++ |
The top lid makes waste loading easy, and the rotating mechanism helps mix the waste efficiently. |
|
Portability |
-- |
The machine has a large structure and a fixed supporting frame, making it difficult to move. |
|
Use of Standard |
- |
Some parts, such as the rotating drum and internal paddles, may require customized fabrication. |
|
Cost |
+ |
The machine can be constructed using locally available materials, helping reduce manufacturing costs. |
| 2 |
Safety |
++ |
Enclosed structure and controlled operation provide better protection to the user. |
|
Ease of user |
+ |
Simple loading and operating mechanism makes it relatively easy to use. |
|
Portability |
-- |
The machine is comparatively bulky and heavy, making it difficult to move. |
|
Use of Standard |
+ |
Most of the components can be made using commonly available standard parts. |
|
Cost |
- |
More components and complex construction increase the overall cost. |
| 3 |
Safety |
Datum |
Reference design |
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Ease of user |
Datum |
Reference design |
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Portability |
Datum |
Reference design |
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Use of Standard |
Datum |
Reference design |
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Cost |
Datum |
Reference design |
| 4 |
Safety |
+ |
The insulated outer shell helps reduce heat transfer to the outside surface and protects users from direct contact with internal components. |
|
Ease of user |
- |
The machine has a control panel and input lid, but operating the agitator and cleaning internal components may require additional effort. |
|
Portability |
- |
The machine contains a motor, heating element, gears, and a strong outer body, which may make it heavy and difficult to move. |
|
Use of Standard |
+ |
The design can incorporate appropriate electrical safety standards, insulation requirements, ventilation provisions, and safe mechanical components. |
|
Cost |
+ |
The machine can reduce household organic waste disposal and produce useful compost. However, the motor, heating element, and control system may increase the initial manufacturing cost. |
| 5 |
Safety |
+ |
The enclosed hopper and mixing mechanisms reduce direct contact with moving parts. |
|
Ease of user |
- |
Operation involves manual actions like handling/loading of material, so it requires more operator effort. |
|
Portability |
- |
Although wheels are provided, the machine is relatively large and bulky, making movement and transportation difficult. |
|
Use of Standard |
+ |
It can follow applicable safety, electrical and material standards during fabrication. |
|
Cost |
+ |
Simple construction and commonly available materials may help reduce manufacturing costs. |