Second, forecasts are mostly short term and mainly based on management opinion. Frequent modifications of these forecasts indicate a lack of confidence in the accuracy of the forecasts. Third, only a few remanufacturers used optimization or statistical techniques to determine batch sizes, routings, safety stock, and lead times for remanufacturing. The uses of such techniques represent an opportunity for remanufacturers to better manage their supply of cores. DISCUSSION QUESTIONS 1. In the United States, laws mandating that companies be responsible for take back of electronic wastes are becoming prevalent at the state level. Today, there are more than 70,000 remanufacturing companies with revenues exceeding $55 billion in annual sales. How does remanufacturing relate to this legislation? How is remanufacturing related to green manufacturing initiatives? 3. Compare the remanufacturing production planning and control framework with the conventional production planning and control framework. What are the major differences between the two systems