In practical terms forensic studies are executed with meticulous precision. They are accompanied by extensive records, both written and photographic. And they are supported by the sum of existing knowledge on the subject at hand. At least in the case of forensic engineering, seldom are two investigations the same. They are like a treasure hunt where the treasure is unknown and its location is a secret.
Forensic engineers are usually in search of the causes of some catastrophe or personal injury.
They begin a study with a complete literature search to gain as much background information as possible. And then, inspect the available physical evidence with the hope of finding clues as to the origin of the problem. This stage may include partial, or complete, disassembly of the evidence. Some destructive, or non-destructive, laboratory testing could be required and evidence may be destroyed in the process. This phase of the work should be carefully photographed with still cameras and with video.