Which statement best describes the difference between push and pull systems in supply chain management?

Which statement best describes the difference between push and pull systems in supply chain management?

• A. Push systems forecast demand and push production and inventory into the network.
• B. Pull systems forecast demand and push production based on actual demand.
• C. Push systems rely on supplier-managed stock while pull systems rely on vendor-managed inventory.
• D. Push systems trigger replenishment in real time; pull systems plan far ahead.

Answer: (A)

The main idea is how planning is initiated: by forecast or by actual demand. Push systems base production and inventory decisions on forecasted demand, then push products through the network to meet anticipated needs. This means you manufacture in advance and place stock at various points in the supply chain, which can help with long lead times and achieving economies of scale but may result in higher inventory or obsolescence if forecasts are off. That’s why the best description is the one stating that forecasted demand drives production and inventory into the network. Pull systems, in contrast, respond to actual demand signals and only produce or replenish as orders or consumption occur, which typically reduces inventory but can raise lead times and rely on agile operations. The other statements don’t fit the core distinction: one mixes forecast with a description that production is driven by actual demand, which is contradictory; another talks about stock management arrangements (supplier-managed vs vendor-managed) rather than the fundamental push vs pull concept; and the last reverses the timing, suggesting real-time replenishment for push and long planning for pull, which is the opposite of how these systems are generally organized.

The main idea is how planning is initiated: by forecast or by actual demand. Push systems base production and inventory decisions on forecasted demand, then push products through the network to meet anticipated needs. This means you manufacture in advance and place stock at various points in the supply chain, which can help with long lead times and achieving economies of scale but may result in higher inventory or obsolescence if forecasts are off.

That’s why the best description is the one stating that forecasted demand drives production and inventory into the network. Pull systems, in contrast, respond to actual demand signals and only produce or replenish as orders or consumption occur, which typically reduces inventory but can raise lead times and rely on agile operations.

The other statements don’t fit the core distinction: one mixes forecast with a description that production is driven by actual demand, which is contradictory; another talks about stock management arrangements (supplier-managed vs vendor-managed) rather than the fundamental push vs pull concept; and the last reverses the timing, suggesting real-time replenishment for push and long planning for pull, which is the opposite of how these systems are generally organized.