Misfill

Misfill is a packaging and filling error in which a container does not receive the correct amount or type of contents as specified. Common manifestations include underfill, overfill, filling with the wrong product, or incorrect concentration. Misfill can occur in pharmaceutical, food and beverage, chemical, and consumer goods manufacturing as part of a production line or laboratory process.

Underfill means the container contains less product than declared; overfill means more. Misfill can also involve the wrong formulation, incorrect dosage strength, or filling a container with a different product or lot than intended, often accompanied by mislabeling.

Causes include equipment calibration drift, sensor or valve faults, misfeed from the hopper, improper changeover between products, line speed exceeding control limits, and human error during setup or packaging verification.

Detection and measurement rely on inline fill sensors, weight checks, statistical sampling, random testing, and traceability systems. Label verification, barcode checks, and batch records help identify misfills and contain their impact.

Prevention focuses on rigorous calibration and maintenance, validated changeover procedures, standard operating procedures, staff training, automated verification, and segregated quarantine of suspect lots until quality checks confirm accuracy.

Consequences of misfill include regulatory noncompliance, product recalls, safety risks, economic loss, and damage to brand trust. Effective reporting, corrective actions, and a culture of continuous improvement are essential to minimize recurrence.