Shipping Forecast in Rockall, Malin, Hebrides, Bailey, and Fair Isle"). This sometimes follows the opposite format (e.g., "There are warnings of gales in all areas except Biscay, Trafalgar and FitzRoy"). The "General Synopsis" follows, giving the position, pressure (in millibars) and track of pressure areas (e.g., "Low, Rockall, 987, deepening rapidly, expected Fair Isle 964 by 0700 tomorrow"). Each area's forecast is then read out. Several areas may be combined into a single forecast where the conditions are expected to be similar. Wind direction is given first, then strength (on the Beaufort scale), followed by precipitation, if any, and (usually) lastly visibility.
Calculating forecast attainment Calculating forecast attainment Calculating forecast attainment periodically (monthly for example) provides visibility to the overall achievement of the plan and the total business bias. The time period of shipping activity should be compared against the forecast that was set for the time period a specific number of days/months prior which is call Lag. Lag is based on the leadtime from order placement to order delivery. For example, if the leadtime of an order is 3 months, then the forecast snapshot should be Lag 3 months (Lag 3). formula_1 Used together with forecast accuracy and forecast bias to have a complete