What are some common issues to look for during post-migration testing?

During post-migration testing, it's important to be aware of common issues that may arise. While specific issues will vary based on the nature of the migration, here are some general areas to consider:

1. Data Integrity: Verify that all data has been accurately migrated to the new system without any loss or corruption. Look for missing or incomplete data, data formatting or structure discrepancies, and data validation issues.
2. Functionality Issues: Test the functionality of the migrated system to ensure that all features and functionalities are working as expected. Check for broken links, missing or disabled features, incorrect calculations, and unexpected behavior.
3. Performance Degradation: Assess the performance of the migrated system to identify any degradation in speed or responsiveness. Monitor page load times, response times, and overall system performance to ensure it meets the expected benchmarks.
4. Compatibility Problems: Verify that the migrated system is compatible with the target environment, including hardware, software, and operating systems. Check for compatibility issues with web browsers, devices, or third-party integrations.
5. User Interface (UI) and User Experience (UX) Issues: Review the UI and UX of the migrated system to ensure a seamless and intuitive user experience. Look for consistency in design, layout issues, poor navigation, confusing or misleading messaging, and difficulties in completing tasks.
6. Security Vulnerabilities: Perform security testing to identify any vulnerabilities or weaknesses introduced during the migration. Test for common security risks such as unauthorized access, injection attacks, insecure configurations, and data exposure.
7. Integration Failures: If the migration involves integrating the system with other components or external systems, verify that the integrations are functioning correctly. Test data flow, communication, and synchronization between the migrated system and the integrated components.
8. Error Handling and Logging: Evaluate how the system handles errors, exceptions, and edge cases. Check if appropriate error messages are displayed to users and if errors are logged and reported for investigation and troubleshooting purposes.
9. Workflow and Business Process Validation: If the system involves specific workflows or business processes, validate that these work correctly after migration. Ensure that approvals, notifications, automated actions, or other business logic function as intended.
10. Cross-Browser and Cross-Device Compatibility: Test the system across web browsers and devices to ensure consistent functionality and appearance. Verify that the system is responsive and accessible across various platforms and screen sizes.
11. Regulatory and Compliance Considerations: If applicable, ensure the migrated system complies with relevant regulations and standards. Test for adherence to data privacy regulations, industry-specific requirements, or other compliance obligations.
12. Data Migration Validation: If data migration was performed, verify that the migrated data aligns with the source system's data. Compare data sets, validate data relationships, and perform spot checks to ensure data integrity.