Weight (Under 30 pounds)
Arrange weight scale and disassembled parts into a compact bundle using rubber bands
Have tester hold all Net Frame parts and step onto weight scale
Record Tester + Net Frame parts weight
Have tester step onto the weight scale to get a baseline measurement
Record tester weight
Subtract weight in Step 5 from weight in Step 3 to get Net Frame parts’ weight
Record Net Frame parts weight
PASS/FAIL: Pass if the average weight is less than 30 pounds.
PASS
Analysis: We found our product to be well under our weight requirement, and we also discovered that the net could be used to make the product more compact and easy to transport.
Size (Fits in a typical car)
Gather parts of Net Frame
Disassemble the Net Frame
Unloop the net from each screw on the net frame
Lay the net out flat, making sure not to tangle it
Carefully dislodge the PVC pipes from the connectors using a firm twisting motion
Leave connectors on pipes like initial assembly
Remove the pins from the PVC frame along with the 2 red spacers and the 2 green spacers
Place the pins and the spacers in the provided bag
Place the disassembled pipes onto the net together and wrap them with rubber bands
Wrap the net around the pipes and bag with the spacers, pins, and electronics case.
Gather everything and place all the parts into a car.
PASS/FAIL: Pass if the net fits in a car comfortably.
PASS
Analysis: Our product fit inside a small car (Prius) with ease. The shape of the product also makes it easy to store in a garage on a shelf horizontally or against walls vertically.
Cost (Under $100)
Calculate price for all parts and percentage of parts used for quantity purchased
Add up prices for all parts
PASS/FAIL: Pass if the total price is less than $100
Total cost of materials: $85.85
PASS
Analysis: Our product was under $100 and made of quality parts that have high durability. To fit the ideals of our customers, we would likely reduce the price of the product for sale with bulk purchasing as the electronics and the net can be produced for much cheaper.
Net is durable (Survives Impact of Ball Net and Frame hit + Waterproof)
Assemble the net
First test durability of the net
Take a tennis ball and racket
Hit the ball into each of the four corners of the net
PASS/FAIL: Pass if net does not rip or fall over PASS 4x
Next test for durability of the frame
Take a tennis ball and racket
Hit the ball into each of the 4 frame pipes
PASS/FAIL: Pass if the frame pipes do not crack and the net does not fall over. PASS 4x
Finally test to see if it is waterproof
Take a spray bottle filled with water and spray it at the electronics case and LEDs
PASS/FAIL: Pass if the electronics still function and the inside of the electronics case is unaffected. PASS
ALL PASS
Analysis: The product was able to withstand repeated impacts from a tennis ball and racket at multiple structural points, so it would survive normal use during training.
Assembly (Under 10 min)
Gather pre-assembled parts of Net Frame.
Start a timer.
Reference build plan and assembly animation for instructions on how to assemble the product
After fully assembled, stop the timer.
PASS/FAIL: Pass if the total time taken to assemble is under 10 minutes.
Average assembly time: 9:18
PASS
Analysis: The product can be assembled with ease under 10 minutes, but it would likely take a new, unacquainted user some experience before they are able to assemble quickly.
Active Feedback
PASS/FAIL: Pass if product has an auditory, visual, and/or tactile signal.
Analysis: There is a visible bounce back and an audible sound of the tennis net being hit by the ball PASS
Higher Technology
PASS/FAIL: Pass if product contains a complex mechanical system, electronics system, and/or analytical software.
Analysis: The four LEDs are a part of an electronic system that enables better accuracy training, and the pin system is a mechanical system that adjusts the angle and allows for more flexibility and versatility of use. PASS
(Ease of use for new players)
Give a tennis racket and ball to people with varying abilities in tennis.
Anthony and Paul: Little to no experience
Vicky: Extremely experienced
Explain to them that the LEDs are a random targeting system and that they should aim for the corresponding quadrant.
Allow them to play for 10 minutes and use the features of the net.
PASS/FAIL: If they are able to learn how to use the net’s features in under 10 minutes effectively, and give a positive rating of the prototype, this test passes.
Average testing time: 4:02 PASS
Analysis: New users were able to work the product much quicker than expected. Experienced tennis players were able to use the product within 1-2 minutes, while inexperienced players did not take longer than 6 minutes to comfortably use the product. This means that our product successfully meets our goal of providing a product for tennis players of varying levels of skill.
Overall, our final prototype met all of the original design criteria based on our rigorous testing, so we consider the project to be a success. Still, an engineer's responsibility is to continuously improve upon existing products, so there are some improvements we could make, which are detailed on the "Evaluation and Recommendations" page.