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Answer: The model with the highest recall where precision is greater than 0.5.
Prioritizing early detection of potential machine failures is essential to prevent costly breakdowns. Therefore, recall, which measures the model's ability to correctly identify true positives (actual failures), should be maximized. A high recall ensures that most imminent failures are caught. Additionally, to avoid triggering too many unnecessary maintenance actions (false positives), it's important that the precision, which measures how many of the predicted failures are true positives, is greater than 0.5. This ensures that more than 50% of the maintenance jobs triggered by the model actually address real machine failures. Therefore, option C, which chooses the model with the highest recall where precision is greater than 0.5, is the correct answer.
Author: LeetQuiz Editorial Team
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You are an ML engineer at a manufacturing company that specializes in producing high-value machinery. The company is facing significant expenses due to unexpected machine failures. To mitigate this, you are tasked with creating a classification model for a predictive maintenance use case. The goal is to predict whether a crucial machine will fail within the next three days, allowing the repair crew ample time to address the issue before a costly breakdown occurs. Regular maintenance of the machine is relatively inexpensive, but an actual failure leads to substantial costs. You have trained several binary classifiers to predict machine failure, where a prediction of 1 indicates an impending failure. Currently, you are evaluating each model using an evaluation dataset. Your objective is to choose a model that prioritizes early detection of failures while ensuring that more than 50% of maintenance jobs triggered by the model correspond to actual imminent machine failures. Given this scenario, which model should you choose?
A
The model with the highest area under the receiver operating characteristic curve (AUC ROC) and precision greater than 0.5
B
The model with the lowest root mean squared error (RMSE) and recall greater than 0.5.
C
The model with the highest recall where precision is greater than 0.5.
D
The model with the highest precision where recall is greater than 0.5.
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