5. CONCEPT EVALUATION AND PRODUCT ARTITECTURE - Y-div-Engg-Exploration-2026-27-Odd/Repo-04 GitHub Wiki

PUGH CHART

Design Objectives Weights Concept 1 Concept 2 Concept 3 Concept 4
Safety 9 + Datum 0 -
Ease of Use 8 ++ Datum - -
Portability 7 - Datum + +
Use of standard parts 6 + Datum - 0
Cost 4 0 Datum + +
Score (+) 31 0 11 11
Score (-) 7 0 14 17
Final Total Net Score +24 0 -3 -6

5.1 JUSTIFICATIONS FOR SCORE GIVEN

Design No. Objective Weight Sign / Symbol Calculated Weighted Score Justification for the Score
1 Safety 9 + 9 Tank tracks provide stable movement and ESP32-S3-CAM allows effective sensing and control.
1 Ease of use 8 ++ 16 ESP32-S3-CAM can process sensor and camera data in one controller.
1 Portability 7 - -7 The Li-Po battery, tank tracks and additional components increase the overall size and weight.
1 Use of standard parts 6 + 6 Standardized microcontrollers and modules ensure high component compatibility.
1 Cost 4 0 0 ESP32-S3-CAM and multiple sensors make the design moderately priced compared to datum.
2 Safety 9 Datum 0 Wheels provide stable movement and the ultrasonic sensor can detect nearby objects (Datum).
2 Ease of use 8 Datum 0 Arduino Nano requires standard programming and separate components (Datum).
2 Portability 7 Datum 0 The design uses several separate components, establishing the baseline space required (Datum).
2 Cost 4 Datum 0 Arduino Nano, motor and ultrasonic sensor form the baseline cost (Datum).
2 Use of standard parts 6 Datum 0 Standard baseline component configuration (Datum).
3 Safety 9 0 0 Mecanum wheels provide controlled movement in multiple directions.
3 Ease of use 8 - -8 ESP 32 requires additional configuration steps for multi-directional control.
3 Portability 7 + 7 Lipo slim batteries and compact components can make the system easy to carry.
3 Use of standard parts 6 - -6 Specific mecanum wheels and custom mounting reduce standard part usage.
3 Cost 4 + 4 ESP 32 cam and standard components can be obtained at relatively low cost.
4 Safety 9 - -9 IR sensors/esp 32 cam have limited range in certain lighting conditions.
4 Ease of use 8 - -8 The walking mechanism requires more complex mechanical control.
4 Portability 7 + 7 AAA batteries and compact electronics can reduce the overall size.
4 Use of standard parts 6 0 0 Standard component configuration matches baseline usage.
4 Cost 4 + 4 ESP32 and IR sensors are relatively affordable components.

5.2 SELECTED DESIGN

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5.3 PRODUCT ARCHITECTURE

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5.4 FUNCTION CLUSTERING

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5.5 INTERACTION BETWEEN SUBSYSTEM

Subsystem List

SL. No. Subsystem
1 Mobility function
2 Smoothing Function
3 Sensing Function

Interaction Details

Subsystem 1 Subsystem 2 Subsystem 3 Interaction Details
Spatial TRUE TRUE spatially connected because the sensor/control system operates the polishing mechanism
Data TRUE TRUE IR sensor/pedal sends control signals to the motor
Material FALSE FALSE no physical material is transferred between sensing/control and polishing mechanism
Subsystem 2 Subsystem 1 Subsystem 3 Interaction Details
Spatial TRUE TRUE It is positioned near the sensing/control and shoe-support areas.
Data TRUE TRUE motor operation is controlled by sensor/pedal signals.
Material FALSE FALSE shoe, dust and polishing liquid interact with the polishing mechanism and shoe-support area.
Subsystem 3 Subsystem 1 Subsystem 2 Interaction Details
Spatial TRUE TRUE the shoe support/frame is physically connected to the sensing/control
Data TRUE TRUE the frame itself does not send or receive control signals
Material FALSE FALSE the shoe placed on the support comes in contact with rotating brushes and polishing liquid
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