You built and manage a production system that is responsible for predicting sales numbers. Model accuracy is crucial, because the production model is required to keep up with market changes. Since being deployed to production, the model hasn’t changed; however the accuracy of the model has steadily deteriorated.
What issue is most likely causing the steady decline in model accuracy?
A . Poor data quality
B . Lack of model retraining
C . Too few layers in the model for capturing information
D . Incorrect data split ratio during model training, evaluation, validation, and test
Answer: D