The provided diagrams illustrate the industrial manufacturing process of frozen fish pies, detailing the separate preparation stages for potatoes and salmon before they are combined for final packaging.
Overall, the production line is divided into two distinct streams: one for potatoes, which can be stored for up to one month, and another for fresh salmon, which must be processed within 12 hours of delivery. These streams eventually merge to create the final product.
Regarding the potato line, raw potatoes undergo cleaning, peeling, and slicing. Subsequently, they are boiled and chilled before being stored. Meanwhile, the salmon line begins with the delivery of fresh fish, which is immediately seasoned with lemon juice and salt. The salmon is then steamed, followed by the manual removal of skins and bones. After a quality inspection, the fish is combined with prepared peas and sauce.
Finally, the prepared ingredients are assembled into microwaveable containers and wrapped. The completed pies are then frozen and moved to a storage facility, where they await dispatch to retailers. The entire process ensures that fresh ingredients are transformed into a convenient, ready-to-eat frozen meal.