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Glossary

Data Mart

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What is a data mart? A data mart is best regarded as a subset of a data warehouse. Oftentimes its use is oriented towards one specific business unit. They are useful to store summarized data, easily accessible to business users within that specific business unit. A data mart has several… 

Data Mesh

What is a data mesh? A data mesh is an architectural paradigm with the purpose of enabling analytic capabilities — such as analytics, machine learning, or data services — at scale by unlocking access to a multitude of data sets and tables from a variety of domains. A data mesh… 

Data Shift

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What is Data Shift? Data shift— or dataset shift, model drift, data drift– is the phenomenon that describes the change in input data in your model (over time), relative to the data it was trained on. It is one of the most common reasons for degrading model accuracy. That’s why… 

Data Warehouse

What is a data warehouse? A data warehouse is a central repository that contains all data of an organization. The data in a data warehouse often comes from a variety of data sources within marketing, sales, finance and operations. Most often, all data in the warehouse has already been cleaner… 

Linear Regression

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What is linear regression? A linear regression is a linear approach to model the relationship between a dependent variable and one or more explanatory variables — the independent variables. We can make a distinction between: Simple linear regression: has one explanatory variable Multiple linear regression: has multiple explanatory variables In… 

Performance Metrics: Accuracy

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What is the Accuracy? The Accuracy is a performance metric that tells you the fraction of the predictions that were correct, without distinguishing between positive and negative predictions. The Accuracy can be a very misleading metric when the data set is unbalanced (when the prevalence is either very high or very…