Forecast Accuracy (C) measures the effectiveness of the Demand to Management OMBP by comparing predicted demand to actual demand, reflecting how well the process anticipates market needs. For example, if a forecast predicts 1,000 units and actual sales are 950, accuracy is 95%, indicating strong performance. Option A (Customer Acquisition Cost) is a marketing metric, unrelated to demand planning. Option B (Supplier Lead Time) assesses supplier performance, not forecasting. Option D (Inventory Turnover) measures stock movement, an outcome influenced by forecasting, not a direct metric. Accurate forecasts drive efficient inventory and production planning, reducing costs (e.g., avoiding $10,000 in overstock) and ensuring customer satisfaction.