What are two types of inspections?

Inspections can be categorized in numerous ways based on the methodology or objective, but two fundamental types commonly recognized across industries are visual inspections and destructive or non-destructive testing inspections. A visual inspection relies on the human eye or optical instruments like magnifying lenses and cameras to detect surface defects, wear, or alignment issues without altering the item. In contrast, non-destructive testing (NDT) inspections use advanced technologies such as ultrasonic waves, X-rays, or magnetic particles to evaluate internal structural integrity without damaging the component. Another common dichotomy in project management and manufacturing is internal inspections, performed by the producing team, versus external inspections, conducted by independent third parties or regulatory authorities to guarantee unbiased evaluation and objective compliance verification.