Design Criteria

Price

The product should be relatively low-cost in order to enable more tennis players to train effectively. The expected price of the finished product, including material costs and potential labor costs, should be reasonable. (Weight = 2)

Active Feedback

Active feedback ensures players can get real-time information during their practice. The product should give feedback to the user immediately or shortly after each hit using some sort of sensory signal. (Weight = 2)

Higher Technology

Advanced technology enables users to have high-quality information. The product should use some form of electronics, mechanical system, or other complex feature to provide feedback and facilitate training. (Weight = 2)

Appeal to Consumer

The product should also be something the consumer could not or would not reasonably make themselves. The product should have significant features that would justify its purchase. (Weight = 2)

Assembly

The product should be easy to set up before use and easy to disassembly after training is complete. The product should not contain an excessive amount of parts. (Weight = 1)

Weight/Size

The product should be easy to move between locations, being lightweight and not excessively large. Ideally, the product can fit inside a gym bag or locker. (Weight = 1)

Learning Time

After the product has been introduced/ bought by the user, it should not take too long for the player to learn how to train with the product. Ideally, learning time should be under 5 minutes (Weight = 1)

Range of Skill

The product should appeal to multiple levels of expertise and skill for tennis players. The product can help beginners to advanced players. (Weight = 1)

Durability

The product should be durable and survive multiple different environments. The product should be resistant to rain, sunlight, wind, and impacts. (Weight = 2)

Grading Scale for Similar solutions

Price: → Graded on a scale. A 5 would correlate to a product costing $30 to $50, while a 1 would correlate to a product costing more than $100.

Active Feedback: → Pass or Fail Criteria. The product should give some sort of feedback through an auditory, visual, or tactile signal to provide better training experience

Appeal to consumer: → Pass or Fail Criteria. The average tennis player would go out of their way to purchase this item, and the product should be simple enough to use but not easy enough to replicate and avoid purchase.

Higher Technology: → Pass or Fail Criteria. The product should use some sort of higher technology -- electronics system, complex mechanical system, analytical software -- while maintaining usability and simplicity for the user.

Assembly: → Graded on a scale. A 5 would mean 5 or less parts and less than 1 minute to assemble, a 3 would mean 10 or less parts and 3-5 minutes to assemble, and a 1 would mean 11 or more parts and more than 5 minutes to assemble,

Weight/Size: → Graded on a scale. A 5 would mean the product could easily fit in a large tennis bag or gym locker and less than 10 pounds, a 3 would mean it can be transported in a vehicle and 20-40 pounds, and a 1 would mean it is difficult to carry and/or weighs 50+ pounds.

Learning Time: → Pass or Fail Criteria. The product's motions, features, and training system takes less than 5 minutes to understand and use effectively.

Range of Skill: → Pass or Fail Criteria. The product can reasonably be used by a wide variety of skill levels ranging from beginner to advanced.

Durability: → Pass or Fail Criteria. The product should be water-proof or resistant, and if applicable, any electronic parts are safe from the outside environment. The product should also be stable enough to withstand light wind and impacts from a tennis ball.

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