Forecast Look Behind
The parameter lets you set the number of days into the past to look for forecasts to be consumed by customer orders during a run of APS Planning. When a customer order is entered in Order Entry, the system looks this number of manufacturing days into the past (earlier than the customer line item due date) for forecast orders to be consumed by the customer order.
Note: The system uses the Forecast Look Behind field on the Planning Parameters
form only if this same field is not entered on the Product Codes form. Set this
parameter only as large as you need it; setting it too large has a tendency to carry
forecast demand deep into the forecast period even when the likelihood of the orders
coming in so late in the period is diminishing. See “Forecasting Overview” for a
description of how this parameter affects the planning of forecasts.
Caution:
If the Use CO or Forecast
parameter is set to Both, and you change either this parameter
or the Look Ahead parameter values, the system may reevaluate
forecast consumption for all items, and this process may take a
long time.