A manager tracks a critical spare part. The daily demand is highly variable. During the constant 4-day delivery period, the average demand is 200 units (mu = 200) with a standard deviation of 30 units (sigma = 30

).

The manager has configured the ERP system to trigger a new order exactly when the total stock drops to 248 units. Based on the standard normal distribution table used in class, what exact Service Level is the manager targeting?