Destructive Examination
Definition
Testing that consumes or modifies the evidence: sectioning for metallurgical mounts, chemical digestion for composition analysis, mechanical testing to failure. Requires notice to all parties and often a joint examination protocol.
- Field
- Failure investigation (engineering forensics)
- Examples
- Sectioning for metallurgical mounts, chemical digestion, mechanical testing to failure
- Requirement
- Notice to all parties, often a joint protocol
- Consequence
- Consumes or permanently alters the evidence
Common questions
Why is advance notice required before destructive examination?+
Because the test consumes or permanently changes the specimen, opposing parties in litigation lose the chance to have their own expert examine the original condition afterward, so a joint protocol lets all sides agree on the method, be present, and record the pre-test state before anything is cut or digested.
What happens if a party skips notice and destroys evidence unilaterally?+
Courts can treat unnoticed destructive testing as spoliation, which may result in sanctions, an adverse inference against the party that destroyed the evidence, or exclusion of the resulting test data, regardless of how sound the underlying engineering conclusion was.
Related terms
- ASTM E860
- Standard Practice for Examining and Preparing Items That Are or May Become Involved in Criminal or Civil Litigation. Specifies documentation requirements and...
- Evidence Preservation
- The discipline of maintaining physical evidence in its post-incident condition until all parties have had the opportunity to examine it. Includes both...
- Hypothesis Generation and Testing
- The step in failure analysis where possible causes are listed systematically, then each is tested against the physical evidence and engineering calculations....
- Non-Destructive Examination (NDE)
- Inspection methods that do not alter or consume the evidence: visual inspection, photography, dimensional measurement, dye-penetrant testing, ultrasonic testing, and radiography. NDE...
- Root Cause
- The fundamental, underlying deficiency from which the failure originated. Distinguished from immediate cause (the final physical event) and contributing factors. Root-cause analysis...