They include the potential for an assessment to improve individual patient outcome, affect a large patient population, reduce unit or aggregate cost
Answer: Riptide is used in close combat and is perfectly balanced in its wielder's hands. Riptide can destroy monsters and hurt immortals. But, since it is made out of Celestial Bronze, it cannot hurt or kill humans, as "they aren't important enough." As a result, when accidentally or even intentionally swung at humans, the blade simply passes through them. For example, in The Titan's Curse, Percy swings Riptide at a human named Rachel Elizabeth Dare by mistake and nothing happened to her. In The Lightning Thief, Percy defends himself against a gang of youths with Riptide, simply acting on instinct, but the blade simply passes through them, which infuriates the gang leader and causes him to chase Percy, Annabeth Chase, and Grover Underwood into Crusty's Water Bed Palace
It is almost impossible to lose as it is enchanted to appear in Percy's pocket if it is somehow lost. However, if Percy doesn't have pockets, it doesn't return, and this has led to a disadvantage, such as when Laistrygonian Giants attacked Percy in the sea of monsters
