Testing and commissioning is the process of verifying and validating the performance of equipment, systems, or projects to ensure they meet specified requirements and function correctly before being put into operation. Testing involves examining individual components or systems to check for quality, safety, and functionality, while commissioning is the final phase where all systems are integrated and confirmed to work together as intended. This process is essential in industries such as construction, engineering, and manufacturing, where complex systems like electrical, mechanical, and HVAC systems are involved. It ensures that all equipment is properly installed, calibrated, and meets performance standards. Effective testing and commissioning help identify potential issues, minimize risks, and ensure that the project or system operates efficiently, safely, and within budget.