How to visually assess food quality

In order to make sure that a product or raw material does not contain any defective or undesirable material (foreign matter), visual inspection is a step in the manufacturing process that determines whether the quality of a product or raw material fulfills standards.

Object being examined

Examples of defects and deficiencies


Misprinted or misprinted letters, cracked lids, scratches or stains on the package, etc.

Food Container                                                 

Burned or scorched, torn, dented, stained, scratched, foreign matter, contaminated, printing error, etc.


Foreign matter contamination, defective products such as shape, color, size, etc.

Visual inspection is the most popular type of appearance inspection, in which goods and raw materials are evaluated visually to determine whether they are good or bad. Visual inspection can be implemented right away as long as trained inspectors are available because it doesn’t need any specialized equipment and doesn’t have any startup expenditures associated with equipment or development.

  • Human error is probable to occur because pass/fail decisions are made based on human senses.
  • Variation in the judgment criteria for defective products occurs depending on the inspector.
  • Mental and physical fatigue reduces the accuracy and slows down the speed of work.
  • Problems in providing personnel to perform visual inspections due to labor shortage