This portfolio discusses the challenges faced by Tesco in operating a global supply chain and logistics network, including limited online potential, high costs of delivery, choice of different tradeoffs, and presenting well-established competition. It also covers the best practices of supply chain management, such as establishing relationships with main suppliers, taking green initiatives seriously, taking full advantage of technology, and collaborating internally and externally. The document type is a portfolio, and the type of assignment is not mentioned. The subject is Global Supply Chain Management, and the course code, course name, and college/university are not mentioned.