Failure Analysis
Gathering evidence for Failure Analysis
Isolate/identify the failure
Locate the failure, fracture, defect
Consider multiple failures or causes
It might be remote from the location of the worst damage
Photograph the scene and all evidence liberally
Secure the scene
Set camera to the correct date and time
Include scale markers in photos to indicate size
Use the highest quality image settings
Obtain photographs before disturbing the evidence
Obtain both overall site photographs and close-up photographs
Review photograph quality before leaving site
Secure evidence
Preserve failed parts, or full assembly if possible
Store evidence in clear, labeled plastic bags
Record the chain of custody (who, what, when, where)
Avoid spoliation
Document location as-found and condition of each item
Do not alter evidence during extraction
Document the extraction process (use notes, sequential photographs, video recordings)
Do not press fracture surfaces together
Do not unthread connections
Gather important site information
Time of incident
Pertinent site or evidence conditions pre- and post-incident (changes or adjustments in usage, settings, lighting, weather, etc.)
Dates of construction, installation, inspections, maintenance
Product manufacturer, model, serial number
User or installation/service manuals
Maintenance/service records
Invoices for purchase/installation
Witness statements
Talk to an expert early
Use an expert to help identify potentially relevant and important features of your case
Retaining an expert
Request expert’s CV
Discuss overall investigation approach
Agree on specific actions
Give clear, specific instructions
Discuss deadlines, milestones and budget
