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25. A hybrid (Push-Pull) supply chain is: Components are purchased from the forecast. Are assembled by the customer order. Use aggregate forecasts which are more accurate - less uncertainty - less safety stock. Use postponement - delayed differentiation. All of the Above 26. An very important success factor in selecting a Forecasting approach is: Do you have good POS data. How much does the data cost you. How important is the past in estimating the future. Do you have executive support. None of the Above 27. In Network Design, Model and Data Validation is answering the question(s): Does it make sense