# Use the Parameter Search Utility

The Parameter Search utility is used to determine which set of ViDi Tool Parameters will give you the best results. The utility runs through both the training and processing parameter combinations for the tool.

To use the utility, you select a workspace, the tool and a grid of parameter values to determine the best combination for your application.

Note:

- The length of the test is dependent upon the GPU (and number of GPUs), the number of parameters, the number of parameter settings per parameter, the number of images, and the number of test runs. Each additional set of parameters and values will cause the execution time of the experiment to run exponentially longer.
- If you have multiple GPUs, along with multiple test runs, the runs will be queued in parallel, and the utility will start the run on the next available GPU. For example, if you have a two GPU system, and a two run experiment, each run will happen on a separate GPU, thus improving the performance of the test execution.
- The Parameter Search application requires the use of the Standard or Advanced Cognex ViDi license.