You have been working with a local, medium-size business to design a human resources system that…

➤ How should testing be structured to ensure payroll accuracy and data integrity?
Structure testing in layers: unit tests for ETL and code, integration tests for APIs and external vendors, system tests for performance and security, and UAT for business scenarios like payroll runs and benefits enrollment. Include automated reconciliation, sample payroll cycles, performance/load tests, and clear exit criteria. Track defects and require business sign-off.