1. USER SURVEY & PRODUCT REQUIREMENTS

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1.1 User Survey Questions & Feedback

Sl. No.	Survey Question Asked	User Feedback / Response	Design Decision
1	How often do you have to move or tilt your desk fan while working?	Most users report constantly having to adjust the fan by hand when changing posture or sliding across their desk.	The fan must track the user automatically across the desk without any manual effort.
2	What worries you most about traditional desk fans?	Spinning blades can hit fingers, catch loose paperwork, or snag dangling headphone wires.[cite: 8]	Build a protective safety grille with narrow gaps so nothing can reach the blades.[cite: 1, 8]
3	How does the noise from typical desk fans affect your work?	Constant motor hum and harsh, uneven wind gusts distract users during work, study, and online calls.	Use a balanced blade design and smooth motors to keep operation quiet and airflow steady.
4	Do you forget to switch off your fan when leaving your desk?	A large majority admit they frequently leave the fan running at full speed in an empty room.	Add an automatic sleep mode that turns off the fan when no one is at the desk.[cite: 6, 10]
5	Would you prefer buttons or hands-free control while working?	Users strongly prefer touchless hand gestures so they do not have to interrupt their workflow.[cite: 6, 9]	Include simple hand-gesture control alongside the automatic tracking.[cite: 6, 9]
6	What is an acceptable price range for a smart desk fan?	Users prefer an affordable budget under ₹5,000 INR using standard, easily repairable parts.[cite: 8]	Stick to standard, low-cost parts rather than rare or expensive hardware.[cite: 1, 8]

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1.2 Basic Product Requirements

Requirement ID	Feature / Need	What It Does (Simple Terms)	Target Goal
REQ-01	Side-to-Side Tracking	Follows you across the desk smoothly as you move in your chair.	180° horizontal turn (left to right)
REQ-02	Up-and-Down Tilt	Tilts toward your hands while typing, or up at your face when you lean back or stand.	-15° downward to +35° upward tilt[cite: 6]
REQ-03	Working Range	Detects you as long as you are seated within normal desk range.	Works from 0.5 m up to 3.5 m away
REQ-04	Smart Breeze Control	Blows softer when you sit close and slightly faster when you move farther back.	Smooth and automatic speed adjustment
REQ-05	Finger Safety Guard	Prevents fingers, pens, or wires from contacting the spinning blades.[cite: 8]	Tight mesh grille with narrow openings under 7 mm[cite: 1]
REQ-06	Auto-Sleep Timer	Turns off the fan and motors when you step away to save power.[cite: 6, 10]	Shuts off after 3 minutes of an empty desk[cite: 6, 10]
REQ-07	Desk Stability	Stays firmly in place on the desk without shaking, rattling, or tipping over when turning.	Weighted bottom plate with rubber feet
REQ-08	Safe Power Supply	Powered by a safe, low-voltage adapter to prevent electrical hazards on your desk.	Standard 12V wall plug (under 36W)[cite: 10]
REQ-09	Compact Size	Fits neatly next to a laptop or monitor without cluttering your workspace.	Base diameter under 16 cm, height under 28 cm
REQ-10	Affordable Cost	Keeps the prototype inexpensive and easy to assemble with standard parts.[cite: 1, 8]	Total parts cost under ₹10,000 INR