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First, letâs define each of these terms: 1  Push System: is a system in which we produce goods based on our best projections of what the market wants. 2  Pull System: is a system in which the production of goods is initiated by the person or organization who consumes that good.
Done queues (output) are for pull flows. Most systems have both push and pull. Push will happen where there are different organizational semantics between work steps. For example, the movement of work items between a product backlog and the input queue for the team is usually a push movement.