5.CONCEPT EVALUATION AND PRODUCT ARCHITECTURE - N-div-2026-27-Odd/Repo-07 GitHub Wiki

PUGH CHART

5.1 JUSTIFICATION FOR SCORES GIVEN:

Assigning weights to the objectives:

Objectives Weights
Safety 7
Ease of use 6
Portability 8
Use of standard parts 8
Cost 6

Writing PUGH Chart for the 5 alternative designs shown in figures:

Design Objectives Weights Design 1 Design 2 Design 3 Design 4 Design 5
Safety 7 0 Datum (+) (+) 0
Ease of use 6 (+) Datum (+) (+) (+)
Portability 8 (++) Datum -- (+) 0
Use of standard 8 (+) Datum (++) 0 (+)
Cost 6 0 Datum -- -- 0 --
Score(+) 30 0 28 21 13
Score (-) 0 0 -11 0 -6
Total 30 0 17 21 7

Justification for the scores given:

Design No. Objective Score Allocated Justification for the Score
1 Safety 8 Counter-rotating rollers, crushing gears, and motorized diverters pose significant entanglement and crushing hazards, while sensors and displays improve monitoring but require guarding, emergency stops, and safety interlocks.
Ease of use 7 Automated conveyors, ultrasonic sensors, and digital displays simplify operation, but configuring the crushing mechanism, maintaining moving parts, and troubleshooting sensors require technical knowledge.
Portability 7 Integrated wheels improve mobility and make relocation easier, although the machine’s weight, bulky components, and need for a stable operating position limit portability.
Use of standard 7 The system uses common motors, conveyor belts, sensors, displays, and control components, although the crushing gears and moulded-pocket mechanisms may require custom fabrication.
Cost 7 The system has moderate-to-high costs due to crushing gears, motorized rollers, conveyor belts, ultrasonic sensors, digital displays, and control systems, partially offset by the use of standard components.
2 Safety Datum
Ease of use Datum
Portability Datum
Use of standard Datum
Cost Datum
3 Safety 8 Soft grippers, ultrasonic sensors, and AI vision improve safe handling and detection, although moving conveyors and motorized diverters still pose pinch hazards.
Ease of use 8 AI vision, LED status indicators, and automated diverters simplify operation, though software setup and sensor calibration require technical knowledge.
Portability 6 Conveyor belts, cameras, and motorized mechanisms add bulk, limiting portability unless the system includes wheels and a compact frame.
Use of standard 8 Conveyors, ultrasonic sensors, LED indicators, and cameras are readily available, although AI integration and custom grippers may require specialized components.
Cost 6 Standard sensors and conveyors help control costs, but AI vision systems, cameras, software integration, and motorized mechanisms increase the overall expense.
4 Safety 7 Soft grippers, infrared sensors, and passive gravity-drop flaps improve handling safety, although the motorized cam-driven press introduces crushing and pinch hazards.
Ease of use 8 Soft grippers, infrared sensors, and passive gravity-drop flaps improve handling safety, although the motorized cam-driven press introduces crushing and pinch hazards.
Portability 7 The gravity-fed mechanisms and passive flaps reduce complexity, although the motorized press and supporting frame add weight.
Use of standard 8 Grippers, infrared sensors, LEDs, and mechanical chutes are widely available, although the cam-driven press may require custom fabrication.
Cost 8 Passive gravity mechanisms and standard sensors reduce costs, although the motorized press and specialized grippers add expense.
5 Safety 7 Soft grippers, photoelectric sensors, and infrared sensors improve detection and handling, although the motorized press and moving conveyor belts pose pinch and crushing hazards.
Ease of use 8 Moulded-pocket conveyors, centering guide rails, and digital displays simplify material positioning, monitoring, and operation.
Portability 5 Multiple conveyor belts, the motorized press, and supporting structures increase the machine's weight and bulk, limiting portability.
Use of standard 8 Conveyors, sensors, displays, and grippers are readily available, although custom moulded pockets and centering rails may require fabrication.
Cost 6 Standard sensors and conveyor components help control costs, but the motorized press, specialized grippers, and digital displays increase the overall expense.

5.2 SELECTED DESIGN:

5.3 PRODUCT ARCHITECTURE AND FUNCTIONAL CLUSTERING:

5.4 INTERACTION BETWEEN SUBSYSTEM:

Subsystem List

SL.NO SUBSYSTEM
1 Cup Handling
2 Cup Crushing
3 Cup dispensing

Interaction List

Subsystem 1:CUP HANDLING

Subsystem 1 Subsystem 2 Subsystem 3 Interaction details
Spatial Yes No Subsystem 1 places the cup in Subsystem 2, while Subsystem 3 is positioned to receive the crushed cup. No direct interaction between Subsystem 1 and Subsystem 3.
Data No No Subsystem 2 detects the cup and generates a crushing completion signal, which activates Subsystem 3 for disposal. But Subsystem 1 does not receive or send any form of signals to either Subsystem 2 or Subsystem 3.
Material Yes No Subsystem 1 transfers the paper cup to Subsystem 2 for crushing. While there is no direct material transfer from Subsystem 1 to Subsystem 3.

Subsystem 2:CUP CRUSHING

Subsystem 2 Subsystem 1 Subsystem 3 Interaction details
Spatial Yes Yes Components interact spatially to pick up, place, sense, orient, crush, and dispense the paper cup into the basket.
Data No Yes Sensors send information about the cup's presence, position, and orientation to the controller. The controller coordinates crushing and indicates when crushing is complete. In this, Subsystem 1 and Subsystem 2 do not interact through any data signals, i.e. no data interaction.
Material Yes Yes The paper cup moves between the handling mechanism, crushing mechanism, and basket. The cup changes from its original shape to a crushed form.

Subsystem 3:CUP DISPOSAL

Subsystem 3 Subsystem 1 Subsystem 2 Interaction details
Spatial No Yes Subsystem 3 is positioned to receive the crushed paper cup from Subsystem 2 and guide it into the collection basket. No direct interaction takes place between Subsystem 3 and Subsystem 1.
Data No Yes Subsystem 3 receives a signal from the controller or sensor of Subsystem 2 to confirm that crushing is complete and the cup can be dispensed, while no data interaction takes place between Subsystem 1 and Subsystem 3.
Material No Yes Subsystem 3 receives the crushed paper cup from Subsystem 2 and transfers it into the basket for collection. While no direct material interaction takes place between Subsystem 1 and Subsystem 3.