5. CONCEPT EVALUATION AND PRODUCT ARCHITECTURE - P-Div-Engg-Exploration-Odd-2026-27/Repo-12 GitHub Wiki

PUGH CHART

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	Task 2 : Write Pugh chart for the 4 alternative designs shown in figures
	Design Objectives	Weights	Design 1	Design 2	Design 3	Design 4
	safety	9	Datum	+	0	++
	Ease of use	8	Datum	+	-	++
	portability	5	Datum	++	-	+
	Use of standard parts	7	Datum	0	+	++
	Cost	6	Datum	-	--	+
	Score(+)		0	27	7	59
	Score (-)		0	6	25	0
	Total		0	21	-18	59

5.1 JUSTIFICATION FOR SCORE GIVEN

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Task 3 : Justification for the scores given
Design No.	Objective	Score Allocated	Justification for the Score
1	safety	0(Datum)	Referrence desigh used for comparison
Ease of use	0(Datum)	Referrence desigh used for comparison
portability	0(Datum)	Referrence desigh used for comparison
use os standard parts	0(Datum)	Referrence desigh used for comparison
cost	0(Datum)	Referrence desigh used for comparison
2	safety	1	Small and simple design reduces the chance of accidents
Ease of use	1	Simple design makes operation easy
portability	2	Small and light weight, so it is easy to carry
use os standard parts	0	Uses commonly available components similar to the reference
cost	-1	Although the robot is small, the required components still involve some cost
3	safety	0	safety is approximately similar to the reference design
Ease of use	-1	Moving tray mechanism makes the design more complicated
portability	-1	Larger body makes it harder to move
use os standard parts	1	uses commonly available electronic and mechanical parts
cost	-2	larger body and additional moving mechanism increase the cost
4	safety	2	Wide and stable base provides better stability and safety
Ease of use	2	PIR detection ,LED greeting and automatic flower movement make operation simple
portability	1	Lightweight body can be moved,although the base is larger
use os standard parts	2	uses commonly avaiable parts such as PIR sensor ,LED matrix LEDs and motor
cost	1	uses simple body contruction and readily available components

5.2 SELECTED DESIGN

5.3 PRODUCT ARCHITECTURE

5.4 FUNCTION CLUSTERING

5.5 INTERACTION BETWEEN SUBSYSTEMS

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Activity 3- 15 mins
Activity 3 : Interaction Details
Subsystem 1	Subsystem 2	Subsystem 3		Interaction Details
Spatial	Guest presence and position	Flower holder position		Detects guest and sends detection signal to Welcome & Interaction Unit.
Data	Guest detection signal	Flower movement command		Provides guest position/distance information for flower movement.
Material	Electrical sensor signal	Electrical control signal		Sends sensor status to the control unit
Subsystem 2	Subsystem 1	Subsystem 3		Interaction Details
Spatial	Guest position and distance	Display and LED location		Sends command to move the flower holder after welcoming the guest.
Data	Detection and distance information	Welcome and status information		Receives control signals to display welcome message and LED indication
Material	Electrical sensor signal	Electrical signals		Controls flower holder movement, stopping and return to initial position.
Subsystem 3	Subsystem 1	Subsystem 2		Interaction Details
Spatial	Guest presence	Flower holder position		Receives guest position information
Data	Sensor status	Move, stop and reset commands		Controls flower movement.
Material	Electrical sensor signal	Electrical control signals		Stops and returns to initial position.