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DEEPCHECKS GLOSSARY

Degradation Model

The idea that an ML project is complete when a trained model is deployed is incorrect. Nonetheless, this assumption is one of the most prevalent errors made by firms launching AI technologies. We witness the polar opposite of this notion in practice. Keep your finest engineers and researchers on an ML project, particularly after it is in production!

If you’ve ever mass-produced a model and started using it, you’ll know that it gradually degrades in performance.

  • To preserve the initial accuracy and avoid the degradation model, you must regularly monitor and update it!

Algorithms are ideally instructed with each new data supply. This creates a maintenance overhead that cannot be automated. Taking care of machine learning models necessitates the rigorous examination, critical reasoning, and manual labor that only highly qualified data scientists can deliver.

This indicates that operating ML solutions has a greater marginal cost than conventional software. Whereas the primary objective for installing these items is to reduce the expense of human labor!

Cause of degradation

When your models first depart the training grounds, their accuracy is frequently at its peak.

Building a model using appropriate and available data and producing accurate forecasts is a good place to start. However, how long do you anticipate those data, which are becoming older by the day, to continue to make correct predictions?

The model’s latent performance is likely to decrease day by day.

This process is known as concept drift, and it is well researched in academics but less so in business. It occurs when the statistical features of the target attribute, which the model is attempting to forecast, change in unexpected ways over time.

Simply put, your model is no longer properly modeling the conclusion that it once did. This presents issues and leads to machine learning model degradation.

This flaw appears to be particularly prevalent in models of human behavior.

The fundamental difference between your ML model and a basic calculator is that it interacts with the actual world. And the data it creates and receives will vary over time. Forecasting how your data will evolve should be an important aspect of any ML research.

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How to solve the degradation

When you see model degradation, you must restructure your model pipeline.

  • Manual learning is one such degradation test method. Here, we feed the freshly collected data into our system and again train and deploy it just as we did the first time we built it. You are correct if you believe this will take a long time. Furthermore, the difficult element is not updating and retraining a system, but rather coming up with new features to deal with idea drift.
  • A second option is to scale your data. Some algorithms make this quite simple. Others will require you to custom construct it yourself. One suggested weighting scheme is to use the data’s inversely proportional age. One suggested weighting scheme is to utilize the data’s inversely proportional age. In this manner, more weight will be given to the latest current statistics and less weight will be given to the oldest data in your training dataset. In this way, if you have drifted, your system will detect it and fix it.
  • The third and best answer is to design your production system so that your models are constantly evaluated and retrained. Such a system of continuous learning has the advantage of being highly automatable, which lowers the costs of human labor.

ML models in production function differently than they do during training due to concept drifts. This is a significant issue that, if not predicted appropriately, can result in poor consumer experience or even model failure.

When your data changes over time, this is the most prevalent cause of idea drifts in production. Monitoring your data and detecting drift as soon as feasible is critical.

To avoid drift in the first place, adopt tactics such as frequent retraining or ensembling.

Before people start complaining about your product, you must solve machine learning drift. If this occurs, it will soon result in a reduction of trust and also very large payments for further repairs. Take the initiative!

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Identifying and Preventing Key ML PitfallsDec 5th, 2022    06:00 PM PST

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