Exploratory Data Analysis

Data quality problems can rapidly derail an AI initiative, even if other aspects of the project are well planned. Mislabeled data points, an unbalanced sample or difficulty accessing stored data can lead models to generate incorrect predictions or fail after they’ve been deployed to production. Unfortunately, these challenges aren’t always obvious at the outset, which can lead teams to waste time and resources developing models that don’t work as intended. That’s why understanding data quality issues is essential for AI projects: By planning to prevent common problems, AI teams can build more reliable, scalable and safe systems. 9 common data quality issues in AI projects Understanding potential problems is an important early step in an AI project. Explore nine of the most frequently encountered data quality issues, such as biased or inconsistent data, sparsity and data silos. 1. Inaccurate, incomplete and improperly labeled data Many AI projects fail because their models rely on inaccurate, incomplete or improperly labeled data. Source data must be cleaned, prepared and labeled correctly. Data cleanliness is such an issue that the data preparation industry emerged to address it. While it might seem straightforward to clean gigabytes of data, imagine having petabytes or zettabytes to clean. Traditional approaches don’t scale, which has resulted in new AI-powered tools to help spot and clean data issues. 2. Too much data Because data is crucial to AI projects, you might think that more data is always better, but you can have too much data. A portion of data is usually unusable or irrelevant. Having to extract useful data from a more extensive data set wastes resources. Extra data might result in noise that can cause machine learning systems to learn from nuances and variances in the data rather than the more significant overall trend. Illustrated list of six elements of data quality: accuracy, completeness, consistency, timeliness, uniqueness and validity. Accurate, complete, consistent, timely, unique and valid data reduces problems in AI system development and improves model performance. 3. Too little data On the flip side, having too little data presents problems. Training a model on a small data set might produce acceptable results in a test environment. However, bringing a model from a proof-of-concept or pilot stage into production requires more data. In general, training on small data sets can produce models that demonstrate low complexity, bias or overfitting, leading to inaccuracy when working with new data. 4. Biased data Data can be selected from more extensive data sets in ways that don’t accurately convey the trends or distribution of the broader data set. In other ways, data could be derived from older information that might have resulted from human bias. Or there could be some issues with how data is collected or generated, resulting in a biased final outcome. 5. Unbalanced data Although everyone wants to minimize or eliminate bias from their data, this is much easier said than done. Unbalanced data sets can significantly hinder the performance of machine learning models by overrepresenting data from one community or group, while unnecessarily reducing the representation of another. Some approaches to fraud detection use unbalanced data sets. Most transactions are not fraudulent, so only a small portion of a data set represents fraud. If a model trained on this fraudulent data receives significantly more examples from one class versus another, the results will be biased toward the class with more examples. Conducting thorough exploratory data analysis is essential to discovering and solving such issues early. 6. Data silos Related to the issue of unbalanced data is the issue of data silos, where only a certain group or a limited number of individuals in an organization can access a data set. Data silos can result from technical challenges, restrictions in integrating data sets, or issues with proprietary or security access control of data. Data silos are also the product of structural breakdowns at organizations where only certain groups have access to certain data, as well as cultural issues where lack of collaboration among departments prevents data sharing. Regardless of the reason, data silos can limit the ability of those at a company working on AI projects to gain access to comprehensive data sets, possibly lowering the quality of results. 7. Inconsistent data Not all data is created equal. Just because you’re collecting information doesn’t mean you can — or should — use it. Training a model on clean but irrelevant data results in the same issues as training systems on poor-quality data. Inconsistent data goes hand in hand with irrelevant data. In many circumstances, the same records exist multiple times in different data sets but with different values, resulting in duplicates and inconsistencies. When dealing with multiple data sources, inconsistency indicates a data quality problem. 8. Data sparsity Data sparsity occurs when data is missing or when a data set contains insufficient specific expected values. Data sparsity can affect the performance of machine learning algorithms and their ability to calculate accurate predictions. If data sparsity is not identified, it can result in models being trained on noisy or insufficient data, reducing the effectiveness or accuracy of results. 9. Data labeling issues One of the fundamental types of machine learning, supervised machine learning, requires data to be labeled with correct metadata for machines to derive insights. Data labeling is complex and requires human resources to put metadata on various data types. This can be complex and expensive. Improperly labeled data is a challenge for in-house AI projects. Accurately labeled data ensures that machine learning systems establish reliable models for pattern recognition, forming the foundations of every AI project. Good-quality labeled data is paramount to accurately training the AI system on the data it is being fed. Why is data quality important in AI projects? Data quality is foundational to the success of AI projects because it directly affects machine learning models’ accuracy and reliability. High-quality data helps AI systems learn accurate patterns and generalize well to new information, leading to better performance in real-world contexts. Conversely, low-quality data leads to