For companies currently hand-weighing and filling their products, one of the first benefits they should see with the introduction of a linear or multi-head weigher is a reduction in product giveaway.
Every product and every company is different. In general, Ohlson feels that a single employee hand weighing and packaging working at a steady pace (about 3 packages per minute) will likely reach an accuracy of around 5%. Higher accuracies are certainly possible, but they may come at the expense of speed and overall output.