Enhancing Data Quality Testing for Langtest

[RakshitKhajuria]

As Langtest prioritizes model quality assessment, it is imperative to acknowledge the profound impact of data quality on model performance. Hence, integrating comprehensive data quality testing measures becomes crucial for ensuring robust model evaluation and development.

To address this need, the following suite of tests is proposed:

1. Data Completeness Assessment
   Description: This test identifies missing values within the dataset.
   Implementation Approach: Compute the percentage of missing values per column and flag columns surpassing a predefined threshold.

2. Data Uniqueness Verification

   Description: This test validates the absence of duplicate entries in the dataset.
   Implementation Approach: Identify and report duplicate rows or values within specified columns.

3. Data Range and Validity Validation

   Description: Ensuring data falls within anticipated ranges or valid value sets.
   Implementation Approach: Validate whether data values align with predefined ranges or valid value lists.

4. Data Correlation Analysis

   Description: Analyzing correlations among different features.
   Implementation Approach: Generate and analyze the correlation matrix to discern inter-feature relationships.

5. Data Anomaly Detection

   Description: Detection of outliers or anomalies within the dataset.
   Implementation Approach: Employ statistical methods or anomaly detection algorithms to flag significant deviations.

6. Data Integrity Verification

   Description: Ensuring maintenance of relationships across different data tables or datasets.
   Implementation Approach: Verify foreign key relationships and cross-references for data consistency.

7. Label Consistency Evaluation

   Description: Assessment of label consistency and accuracy.
   Implementation Approach: Audit and validate label assignments to ensure consistency.

8. Class Imbalance Analysis

   Description: Evaluation of class distribution in classification scenarios.
   Implementation Approach: Calculate and report the proportion of each class to assess class balance.

9. Feature Importance Assessment

   Description: Determination of feature relevance to the target variable.
   Implementation Approach: Utilize feature importance scores or coefficients to rank features based on their predictive power.

10. Label Noise Detection

    Description: Identification of errors in data labeling.
    Implementation Approach: Employ anomaly detection or clustering techniques to identify mislabeled data points.