Planning Horizon for Demand History
We are implementing SPP.
We have a demand history of 24 months (from October 2005 to September 2007). However, the Demand Histroy data in Planning Book starts from October 2003. And additionally, it takes 0 as the demand history for the period October 2003 to Septemeber 2005 and then the actual demand history starts.
Due to this, there is an error in forecast.
Please let us know how to configure the planning book, so as to take only the required demand history (in our case, 24 months).