from store, which the returned goods are sent back to warehouse and after that either warehouse scrap the goods or send them back to supplier for replacement depending on the warranty of the merchandise. Digitizing supply chains Consultancies and media expect the performance efficacy of digitizing supply chains to be high. Additive manufacturing and blockchain technology have emerged as the two technologies with some of the highest economic relevance. Additive manufacturing The potential of additive manufacturing is particularly high in the production of spare parts, since its introduction can reduce warehousing costs of slowly rotating spare parts. Digitizing technology bears the potential to completely disrupt and restructure supply chains and enhance existing production routes. Blockchain In comparison, research on the influence of blockchain technology on the supply chain is still in its early stages. The conceptual literature has argued for a considerably long time that the highest performance efficacy is expected in the potential for automatic contract creation. Empirical evidence contradicts this hypothesis: the highest potential is expected in the arenas of verified customer reviews and certifications of product quality and standards. In addition, traditional supply chain has many drawbacks such as lack of transparency and trust, and some of them can be solved by blockchain technology. The technological features of blockchains support transparency and traceability of information, as well as high levels of reliability and immutability of records. That helps traditional supply chain management to be more efficient and reliable. Systems and value Supply chain systems configure value for those that organize the networks. Value is the additional revenue over and above the costs of building the network. Co-creating value and sharing the benefits appropriately to encourage effective participation is a key challenge for any supply system. Tony Hines defines value as follows: "Ultimately it is the customer who pays the price for service delivered that confirms value and not the producer who simply adds cost until that point". Global applications Global supply chains pose challenges regarding both quantity and value. Supply and value chain trends include: Globalization Increased cross-border sourcing Collaboration for parts of value chain with low-cost providers Shared service centers for logistical and administrative functions Increasingly global operations, which require increasingly global coordination and planning to achieve global optimums Complex problems involve also midsized companies to an increasing degree These trends have many benefits for manufacturers because they make possible larger lot sizes, lower taxes, and