The term supply chain implies a fixed, linear set of entities aligned to manage the sourcing, production, and delivery of products and services. However, today's supply chains are more like networks than chains. Customers are located around the globe, which means a company's distribution network must be similarly located. Outsourced manufacturing (i.e., contract manufacturing) may be used to handle peaks in production, or entire lines of product. Multiple manufacturing locations may be involved in producing a single end item. The supplier base may span the globe as well. Maximizing the performance of these supply networks is impossible without systems and tools. The complexity of the network is more than a planner working with spreadsheets and rules of thumb can handle. This is why advanced planning and scheduling tools have become strategically important.
Forecasting, scheduling, and planning tools linked to transactional data in enterprise requirements planning (ERP) systems can have dramatic impacts on customer service levels, inventory costs, production costs, throughput, and administrative costs. When the solution is well designed and well implemented, the impossible becomes possible. Finished goods inventory turns can rise while service levels improve, throughput can increase while work in process falls, and output can improve without investment in capital equipment. These become the sources of true competitive advantages in an industry. Understanding how to maintain these solutions to optimize the supply chain is something that should reside within the control of the organization. Otherwise, the ability to sustain any competitive advantage is at risk.
Failure to properly design and execute a supply chain solution can have disastrous results. The well publicized case of Nike's supply chain systems rollout in 2000 is a good example. An error in the demand plan published to Nike's suppliers cost Nike an estimated $100 million (USD) in lost sales, and a 20 percent drop in its stock price. On the other hand, this did not derail Nike's supply chain system implementation. Over the next four years, they made significant progress in reducing production lead times from nine months to six months. Nike believes that its supply chain strategy is a vital link in maintaining its leading position in the industry, and has stuck with the project despite the initial glitches. (Koch, Christopher. 2004. Nike Rebounds.