What is an advantage of using nondestructive tests before destructive methods in document examination?

Using nondestructive tests in document examination is crucial as it allows for the preservation of evidence. This is particularly important in forensic contexts where documents may be vital pieces of evidence in a case. By employing methods that do not alter or damage the original document, investigators can analyze the evidence without compromising its integrity. This preservation is essential for maintaining the chain of custody and ensuring that the evidence can still be presented in court if needed.

In contrast, destructive methods may irreversibly change or damage the document, potentially leading to loss of information or making the document unusable as evidence. While other considerations, such as accuracy, speed, and cost, are important in evaluating testing methods, the primary advantage of nondestructive testing lies in its ability to keep the original document intact for further analysis and legal proceedings.