Items classified as not readily processed by automated machinery often possess irregular shapes, sizes, or physical properties. For instance, an envelope bulging with thick contents or one adorned with clasps and string cannot be reliably fed through high-speed sorting equipment. Similarly, packages wrapped in cellophane or other slick materials might jam conveyor belts designed for cardboard boxes. This characteristic necessitates manual handling, impacting processing speed and cost.
The ability to automate mail and parcel processing is critical for efficient, large-scale operations in postal services, logistics companies, and other industries handling significant volumes of physical items. Historically, the shift from manual sorting to automated systems dramatically increased throughput and reduced labor costs. Distinguishing items requiring special handling allows for optimized workflows, ensuring that appropriate resources are allocated where needed. This distinction becomes increasingly important as mail volume grows and automation technology advances.