class: center, middle, inverse, title-slide .title[ # Data Quality Analysis (DQA) ] .author[ ### Dr Thiyanga S. Talagala ] .author[ ### ] --- ## What is Data Quality Analysis? Process of analyzing the quality of data in datasets to determine potential issues, shortcomings, and errors. Missing values - Inconsistent values - Wrong information due to manual/ automated data errors - Wrong metadata information --- ## Dimensions of Data Quality Analysis 1. Consistency 2. Accuracy 3. Validity 4. Timeliness 5. Uniqueness 6. Completeness --- Tasks in DQA 1. Data profiling 2. Data cleansing 3. Data reduction 4. Data transformation/ Data discretization 5. Data enrichment 6. Data validation