A field test is a practical evaluation conducted in a real-world setting to assess the performance and effectiveness of a product, service, or system. This type of testing allows researchers and developers to gather data on how well something works outside of controlled laboratory conditions. It helps identify any issues that may not have been apparent during initial testing phases. Field tests are commonly used in various industries, including agriculture, technology, and education. For example, a new agricultural pesticide might be tested on actual crops to see how it performs against pests in different environmental conditions. This feedback is crucial for making improvements before a full-scale launch.