System Integration

Correct Answer: Analyze for potential bottlenecks and optimize the system's performance via possible hardware or software upgrades.

The best approach to tackle this situation is to 'analyze for potential bottlenecks and optimize the system's performance via possible hardware or software upgrades.' This approach will help identify the root cause of the issue and implement appropriate solutions. This approach aligns well with the project management practice of root cause analysis. The other options have some issues. 'Continue with the integration and fix the performance issue post-integration' is not ideal because it might introduce more problems down the line. 'Replace the legacy system with a modern system' may not be feasible due to various constraints such as cost, time, or business requirements. Lastly, 'Assign the task to a third-party outsourcing team and let them handle it' also might not be the perfect solution as this could lead to a loss of control over the project and the focus should be on fixing the issue in-house first.

Correct Answer: Conduct a data validation and cleansing process before integration.

The best decision would be to Conduct a data validation and cleansing process before integration. This approach ensures that the data in all systems is consistent and accurate before it is combined, reducing the risk of data mismatch issues during and after integration. Choosing an entirely new system to bypass the mismatch issue might be an overkill and also expensive, not to mention the possible resistance to change from stakeholders. Proceeding with the integration and solving data issues later can create more serious problems post-integration, as the quality of data could directly affect the functioning of the integrated system. Purging all data and start collecting it from scratch post-integration disregards the value and significance of historical data, which could be critical to business decisions and operations.

Correct Answer: Revisit the integration testing strategy, identify bottlenecks or weak points, and stress test these areas.

The best answer to this scenario is to revisit the integration testing strategy, identify bottlenecks or weak points, and stress test these areas. This is because the problem lies within the integration phase, and that's where emphasis should be placed to rectify the instability. The choice of discarding the new system and revert back to old systems is a premature conclusion. Before making such drastic decisions, it's worth trying to optimize the current system. Going live with the new system and fixing issues on-the-go can negatively impact customer experience and lead to even bigger issues like losing customer trust. Lastly, pursuing an alternative technology solution and stopping the integration might bring more complexity and delays. The current systems and technology might be perfectly capable to handle the requirements, but perhaps they weren't properly optimized or correctly integrated.