PUGH CHART

Design Objectives	Weights	Design 1	Design 2	Design 3	Design 4
Safety	9	+	DATUM	-	+
Ease of Use	7	++	DATUM	+	-
Probability	5	+	DATUM	+	+
Use of standard	6	+	DATUM	++	-
Cost	6	+	DATUM	-	++
Score(+)		32		29	23
Score (-)		8		15	15
Total		24	0	14	8

Design 1 (Image 1):

• Plus Score: $(7 \times 1) + (6 \times 2) + (7 \times 1) + (9 \times 1) = 32$
• Minus Score: $(8 \times 1) = 8$
• Net Score: $32 - 8 = 24$

Net Score: $32 - 8 = 24$

Design 2 (Image 3) [DATUM]:

• Baseline reference (0 score).

Design 3 (Image 2):

• Plus Score: $(6 \times 1) + (7 \times 1) + (9 \times 2) = 29$
• Minus Score: $(7 \times 1) + (8 \times 1) = 15$
• Net Score: $29 - 15 = 14$

Design 4 (Image 4):

• Plus Score: $(7 \times 1) + (7 \times 1) + (8 \times 2) = 23$
• Minus Score: $(6 \times 1) + (9 \times 1) = 15$
• Net Score: $23 - 15 = 8$

CLIENT TO DESIGNER PERSPECTIVES

Functions from Client Perspective	Functions from Designer perspective
Pour or load grains into the machine	Design a suitable input hopper
Sort grains by size	Add adjustable mesh screens or sieves
Remove stones and unwanted materials	Include a vibration-based separation system
Detect discolored or defective grains	Use a camera and image-processing sensor
Separate different grain types	Implement color, shape, or size recognition
Collect sorted grains	Provide multiple collection containers
Adjust sorting settings	Add buttons, knobs or a viewing window
Stop the machine in an emergency	Install an emergency stop button
Prevent grain blockage	Design smooth pathways and an anti-jamming mechanism
Operate the machine safely	Add guards, insulation, and automatic shutoff
Clean the machine easily	Use removable trays and accessible components
Know when sorting status changes	Add indicator lights or a display
Reduce dust during operation	Include dust filters or an exhaust system
Transport the machine easily	Use a compact frame with handles or wheels
Maintain consistent performance	Add speed control and calibration features
Use the machine with low power	Select an efficient motor and power system
Identify errors and faults	Display error messages and warning indicators
Operate with low noise	Balance rotating parts and use noise-reducing enclosures
Support troubleshooting	Include diagnostic indicators and clear maintenance instructions
Know the battery levels at all times	Include microchips and monitoring screen
Avoid any incomplete sorting cycles

PROJECT SUMMARY

Point Number	Title / Phase	Grain Sorter Project Deliverable & Information Summary
5.	Concept Evaluation & Product Architecture	Pugh Chart Analysis: Comparing alternative design concepts (Designs 1–4) against an established baseline criteria framework (Safety, Cost, Portability, Parts Standardization, and Operational Simplicity).
5.1	Justifications for Score Given	Comprehensive operational trade-offs for each layout, scoring Design 4 highest due to its balanced combination of custom safety shrouds, standard off-the-shelf electronics, and modular frame optimization.
5.2	Selected Design	Design 4 officially designated as the final deployment architecture, meeting structural footprint metrics, keeping overall unit costs below $150, and optimizing sorting accuracy.
5.3	Product Architecture	System Layout Breakdown: Defining the physical arrangement mapping, including structural layout of the automated hopper intake channel, sensor platform housing, electrical control core box, and automated diversion bins.
5.4	Function Clustering	Functional Group Integration: Combining independent sub-tasks into physical clusters: (1) Feeding Unit (vibratory channel and gravity gate), (2) Sensing and Core Logic (optical sensor suite + microcontroller shield), and (3) Ejection Mechanics (servo-activated flip gate).
5.5	Interaction Between Subsystems	Interface Flow Mapping: Specifying electrical connectivity constraints (microcontroller driving the separation servo) and material flow behavior (grains cascading down the physical chute from detection points into sorted classification bins).

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