05. Concept selection and Evaluation - W-Div-Engg-Exploration-Odd-2026-27/Repo-01 GitHub Wiki

5.1 Assign weights to the objectives

Objectives Weights
Smooth movement 6
Cost 8
Durability 7
Aesthetics 3
Ease of use 5

5.2 Pugh chart for the alternative designs

Design Objectives Weights Design 1 Design 2 (Datum) Design 3 Design 4 Design 5
smooth movement 6 0 0 + + +
cost 8 + 0 - - 0
durability 7 0 0 - + +
aesthetics 3 - 0 0 + ++
interactivity 5 0 0 0 ++ ++
Score (+) +8 0 +6 +26 +29
Score (-) -3 0 -15 -8 0
Total Weighted Score +5 0 -9 +18 +29

5.3 Justification for the scores given

Design No. Objective Score Allocated Justification for the Score
1 smooth movement 0 Works just like the baseline wheeled setup.
cost + Cheaper because it has no complex robotic arms.
durability 0 Same basic structural strength as the datum.
aesthetics - Looks basic due to the external display box.
interactivity 0 Standard sensors offer normal desk interaction.
2 (Datum) smooth movement 0 Datum
cost 0 Datum
durability 0 Datum
aesthetics 0 Datum
interactivity 0 Datum
3 smooth movement -- The crawler leg mechanism moves very poorly and shakes.
cost - Using two different microchips makes it more expensive.
durability -- The exposed leg joints break easily over time.
aesthetics 0 Looks average, similar to the datum.
interactivity 0 Basic sensor feedback comparable to the datum.
4 smooth movement + Gear mechanism and servo provide smooth motion.
cost - Extra display and gear parts increase the cost.
durability + Wide circular base makes it very stable.
aesthetics ++ Modern head unit and clear screen look great.
interactivity ++ Great feedback from the camera, sensors, and dual screens.
5 smooth movement ++ Belt and pulley system moves very smoothly and quietly.
cost 0 Reasonable cost despite having helpful desk tools.
durability ++ Stationary desk design means no moving wheels to break.
aesthetics ++ Clean design with a built-in pen holder and LED.
interactivity ++ Touch sensors, mic, and speakers make it very easy to use.

5.4 selected concept