Select NA-CL on the Exponential Smoothing icon drop-down or click the NA-CL icon in the Low Volume group to use a non-trended Additive Seasonality Constant Level exponential smoothing model. Note that NA-CL is included in the Low Volume group because it works well for items with seasonal, low volume demand.
The modifier associated with NA-CL Exponential Smoothing is:
\NA-CL. Use the non-trended Additive Seasonality Constant Level exponential smoothing model.