This document discusses factors that influence distribution network design such as customer service, costs, and various design options. It analyzes six distribution network designs: manufacturer direct shipping, in-transit merging, distributor storage with carrier delivery, distributor storage with last-mile delivery, manufacturer/distributor storage with customer pickup, and retail storage with customer pickup. Online sales can impact customer service metrics like response time as well as costs like inventory and transportation. The document uses Dell as a case study.