Here is a list of 100 common data quality issues typically found in large-scale projects:
- Missing data points
- Duplicate records
- Incorrect data entry
- Data entry inconsistencies
- Outdated data
- Incomplete data fields
- Misformatted data
- Data misalignment between systems
- Data redundancy
- Unstandardized units of measurement
- Data entry errors due to human mistakes
- Missing or incorrect timestamps
- Incorrect data relationships
- Data contamination from external sources
- Lack of data validation during collection
- Inconsistent coding systems
- Non-conformity to predefined data formats
- Errors during data conversion
- Incorrect categorization of data
- Failure to capture all data variables
- Missing or erroneous metadata
- Lack of clear data definitions
- Non-standardized abbreviations
- Data drift in real-time systems
- Lack of proper documentation for data sources
- Errors in aggregated data
- Data inconsistencies between departments or teams
- Missing required fields in data entries
- Data normalization issues
- Outlier data points that skew results
- Insufficient quality checks during data collection
- Manual data entry errors
- Time-zone related inconsistencies
- Lack of proper error reporting in data collection tools
- Inconsistent data collected from different geographical locations
- Variability in data collection instruments
- Incomplete survey responses
- Use of out-of-date templates or forms
- Non-compliance with regulatory or industry standards
- Incorrectly mapped data between systems
- Unverified third-party data
- Improper sampling techniques
- Lack of audit trail for data changes
- Invalid or outdated identifiers
- Inconsistent use of identifiers across systems
- Missing or incorrect primary keys
- Irrelevant or non-actionable data collected
- Difficulty linking data from different sources
- Incorrect data aggregation formulas
- Over-reliance on automated data collection tools
- Poor quality or lack of source data
- Data truncation errors during storage
- Corrupt data files
- Out-of-sync data between operational and reporting systems
- Unclear ownership of data entries
- Poor data lineage tracking
- System glitches or crashes during data input
- Incorrect calculations or formulas used in data processing
- Data integration issues from third-party tools
- Lack of version control for data entries
- Outdated or expired survey instruments
- Data non-representative of the target population
- Invalid data type (e.g., text in numeric fields)
- Absent consistency checks for new data
- Deteriorating data quality over time
- Lack of standard operating procedures (SOPs) for data entry
- Untracked changes or edits in databases
- Misleading or confusing visualizations due to poor data quality
- Unreliable automated data reports
- Confusing or poorly organized data formats
- Lack of system backup for crucial data
- Limited data accessibility for stakeholders
- Manual data compilation errors
- Overcomplicated data structures
- Inconsistent interpretation of data in reports
- Problems arising from multi-source data integration
- Lack of real-time data updates
- Errors in predictive data modeling
- Data bias in collections or analysis
- Inconsistent and incomplete audit trails
- Misleading conclusions drawn from incomplete datasets
- Failure to cleanse data before use
- Improper handling of missing or null values
- Difficulty in comparing data over time
- Excessive reliance on outdated legacy systems
- Absence of data security protocols
- Incorrect version of data used for analysis
- Overfitting models to poor data
- Non-existence of a data governance strategy
- Too much reliance on unverified data sources
- Lack of automated checks for duplicate records
- Missing references or cross-references in data
- Incorrect or outdated system configurations
- Insufficient data validation rules on entry forms
- Absence of metadata for unstructured data
- Failure to implement robust data quality management tools
- Lack of periodic reviews of data collection processes
- Errors in data entry due to inadequate training of staff
- Lack of standardization across different departments or regions
- Inconsistent data reporting frequency or timeliness
This list provides an overview of common issues that may arise during data collection and handling in large-scale projects, emphasizing areas for improvement and the importance of proactive management.
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