Another limitation is the difficulty to use a pull system for avoiding overproduction. The production systems
designed for high producing egg layer hens is based on mass production principles. For each layer house,
probability distributions of production and quality parameters are gradually changing as the age of laying hens
increases. These changes are mainly governed by biological factors that are not under the control of production
managers. Because consumption eggs are a perishable product, they have to be collected, classified, packed, and
distributed regularly, minimizing lead times. For this reason, improvement proposals were focused in creating
continuous flow.