While it has not been mentioned explicitly by Flipkart, here is how this service will work from merchants point of view. They will need to stock their products at Flipkart’s warehouses even before the orders are placed. Flipkart will let the merchants know the quantity of products based on intelligence they gather from history of orders for that products. As products will be available with Flipkart itself at the time order is placed, quality checks and expedited shipping is possible.