sentences:  Market locations are appropriate where there is a desire to communicate customer pull up the supply chain.The aim of the 'market' is to send single unit consumption signals back up the supply chain so that a demand leveling effect occurs.Just as in a supermarket it is possible for someone to decide to cater for a party of 300 from the supermarket so it is possible to decide to suddenly fill ten trucks and send massively distorting signals up those same pathways.