write this post in different words: Victoria's Secret (VS) has 2 supply chains running in parallel. One is the "Basic" supply chain, which has a constant demand year round and the "Fashion" supply chain that changes based on seasons. The inventory management for the "Basic" has a safety stock level of 4 weeks, whereas the inventory management for the "Fashion" line is very different. VS uses a "pull-based" allocation for basic categories for which historical data is available. 52 weeks forecasts are evaluated weekly and monthly to ensure that the supply meets demand. Further, stores are replenished once in 2 weeks