Your freezer has failed, now what?

For commercial kitchens a freezer breakdown can have severe consequences affecting both customer service and profits. Stock contained within the broken freezer must be assessed for safety and disposed of if unsafe to eat. But how can you tell what should be thrown away, and what can be reused? If you know that the refrigeration has only just failed,  eg: a loss of power or you are onsite at the time of failure, you can follow these steps to help [...]