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Test Criteria

Design Test

  • Do screws back out?
  • If special tools are needed, do we have enough of them? Torx, Allen, etc?
  • During assembly
  • Does it feel solid?
  • If there are points of weakness, where are they?
  • Anything obviously wrong should be noted
  • Do the buttons actuate? Anything interfering with them?
  • Static Electricity testing
  • Electrical shorts through housing?
  • Do cables fit securely?
  • Do they break contact?
  • Does the housing interfere with cable connections?
  • Squeeze the device and look for any changes in behavior or fit/finish
  • Shake the device, listen for loose PCB or other parts
  • If the device has mounting affordances, mount it
  • How much force is required to remove it?
  • How much force is needed to mount it?
  • Can it be twisted off of the mounting surface/area?
  • How do finishes hold up with abrasion?
  • Is the device easily cleanable?
  • Fingerprints?
  • Do housing components assemble/align well?
  • Has intended design symmetry been preserved?
  • Are corners broken? Any obvious burrs?
  • Are fillets present?
  • Holes in housing for connectors
  • What is the appropriate torque application for screws? Are electric screwdrivers not advised?

CAD Sanity Check


  • Have we made sure that all parts are final production units and not holdovers from prototyping?

Vendor Acceptance/QA

Tolerances and Standards

  • Measure Against Drawings, check against Codeshelf standard tolerances (on drawings)

    • Thickness
    • Height
    • Length
    • Width
  • Finish Examination

    • Any surface finish callouts on drawings should be checked against finished parts
    • Note any obvious mechanical flaws on mating surfaces
    • Note cracks, flaws or imperfections
    • Corners rounded/broken? Check for sharp edges
    • Look for mars, scratches
  • Mechanical Fit and Alignment

    • Test-fit mating parts and examine for alignment issues
  • Assembly Tests
    • Assemble fully
    • Tighten screws
    • Check for gaps in mating parts
    • Housing ports/holes for connectors
    • How close is the fit around the cable?
    • Does the cable break contact?
  • Functional Tests
    • Buttons
      • Do buttons function as intended, mechanically?
      • Are they aligned in their openings?
  • Screens
    • Is the screen aligned with the edges of the housing?
    • Are all pixels visible?
  • Antennae
  • Screws/fasteners
    • Do screws back out?
    • What happens when you overtighten them?
  • Endurance Tests
    • Drop Test
    • Drop device from the height it is normally used from/mounted at
  • Shake Test
    • Vigorously shake the device and listen for rattles and other sounds, note them
  • Cable pull/Twist
    • Insert cables and pull them out.
    • Note how much force is needed
    • Note any breakage or loose parts
  • Squeeze Test
    • Squeeze the assembled device with your hands and look for gaps in the housing, note any sounds or breakage

Measurements Data Verified/Collected:

Finish Notes

Assembly Notes

Mechanical Tests Performed