5. CONCEPT EVALUATION AND PRODUCT ARCHITECTURE - N-div-2026-27-Odd/Repo-01 GitHub Wiki

PUGH CHART

5.1 : Justifications For Score Given

Design Objectives & Criteria Weights

Objectives	Weights
Safety	9
Ease of use	7
Portability	5
Use of standard	6
Cost	6

Pugh Chart for Alternative Designs

Design Objectives	Weights	Design 1: Datum (Baseline)	Design 2: Cartesian Gantry System	Design 3: Rotary Indexing Table System	Design 4: Hybrid Arm & Automated Module System
Safety	9	Datum	(+)	(-)	(+)
Ease of use	7	Datum	(+)	(-)	(+)
Portability	5	Datum	(+)	(-)	(+)
Use of standard	6	Datum	(0)	(0)	(+)
Cost	6	Datum	(+)	(-)	(-)
Score (+)		0	26	0	27
Score (-)		0	0	27	6
Total		0	26	-27	21

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Justification for the Scores Given:

Design No.	Objective	Score Allocated	Justification for the Score
1	Safety	Datum
	Ease of use	Datum
	Protability	Datum
	Use of standerd	Datum
	Cost	Datum
2	Safety	9	Excellent flexibility for complex curved motions like Aarti wafting and ringing the bell simultaneously
	Ease of use	6	Requires advanced inverse kinematics and sensor-based collision detection for safety near devotees.
	Protability	4	High component cost due to multi-axis servo joints, encoders, and dedicated controllers
	Use of standerd	9	Sleek, human-like motion closely resembles authentic ritual gestures
	Cost	5	Multi-axis joints under continuous load face higher risk of joint fatigue, backlash, and thermal overheating during extended temple-hours
3	Safety	7	Good indexing for sequential tasks (dispensing liquid, offering flowers, lighting incense), but limited range of motion
	Ease of use	8	Enclosed rotating hub protects devotees from moving parts
	Protability	8	Moderate cost using a single heavy-duty rotary actuator and index plate
	Use of standerd	8	Highly compact, circular tabletop layout ideal for small altars
	Cost	9	Uses a centralized index mechanism with fewer moving failure points, making it highly dependable for repetitive daily rituals.
4	Safety	9	Dedicated automated modules handle liquid/incense while the 2-DOF arm handles Aarti wafting.
	Ease of use	9	Balanced automation with built-in proximity safety sensors to pause operation when devotees approach
	Protability	7	Balanced trade-off between custom fabrication and off-the-shelf actuators
	Use of standerd	9	Traditional sanctuary presentation with modern integrated mechanism
	Cost	8	Isolates liquid dispensing pumps from the motion arm, reducing overall system stress and allowing reliable prolonged usage.

5.2 : Selected Design And Product Architecture

5.3 : Function Clustering

5.4 : Interaction

Subsystem List

SL.NO	SUBSYSTEM
1	Dispensing flowers and Akshata
2	Performing Aarti
3	Ringing the bell

Interaction List

Subsystem 1

Subsystem 1	Subsystem 2	Subsystem 3	Interaction details
Spatial	yes	yes	subsystem dispenses flowers and akshatha Subsystem 1 dispenses flowers and Akshata, while Subsystem 2 performs Aarti and Subsystem 3 rings the bell
Data	yes	yes	coordinates flower dispensing, Aarti movement, and bell ringing in the correct sequence
Material	No	yes	Subsystem 1 releases flowers and Akshata for offering, while Subsystem 3 uses a striker to ring the bell

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Subsystem 2

Subsystem 2	Subsystem 1	Subsystem 3	Interaction details
Spatial	yes	yes	Subsystem 2 moves the Aarti lamp in a circular motion near the deity, with Subsystem 1 and Subsystem 3 positioned appropriately.
Data	yes	yes	Subsystem 2 receives signals from the controller to coordinate Aarti movement with flower offering and bell ringing.
Material	no	no	Subsystem 2 moves the Aarti lamp; no material is transferred to the other subsystems

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Subsystem 3

Subsystem 3	Subsystem 1	Subsystem 2	Interaction details
Spatial	yes	yes	Subsystem 3 is positioned near the temple bell, coordinated with flower offering and Aarti movements
Data	yes	yes	Subsystem 3 receives control signals to ring the bell at the correct time during the pooja sequence.
Material	no	no	Subsystem 3 uses a striker to ring the bell without transferring material to the other subsystems