Product testing includes a suite of reliability and environmental tests. Tests like Highly Accelerated Life Testing (HALT), Highly Accelerated Stress Screening (HASS), Accelerated Life Cycle Testing, Accelerated Weathering Testing, Environmental Stress Screening (ESS), Thermal and Humidity Environmental Testing, Mechanical Endurance Testing, Vibration and Shock Testing and Reliability Growth Testing are usually employed to gauge safety and performance of products.