One of the many factors that a retailer, such as Walmart or Dell, faces has to d

One of the many factors that a retailer, such as Walmart or Dell, faces has to do with supply chain business contracts with third-party vendors.
If you were a retailer, are there any business functions that you would not even consider outsourcing to a third-party service provider (3PL)? If not, why not? Your choice of a type of retailer could be some local one person business, such as Bob’s Fruit Stand or a larger company such as Walmart.