Is there any kind of report under "warehouse" or "purchase" that does forecasting how much we should keep inventory based on the sales volume & turnover per sku?

I am using Nav 6.0 SP1 and wondering if there is any kind of report under “warehouse” or “purchase” that does forecasting how much we should keep inventory based on the sales volume & turnover per sku?

Those who will solve this problem will be billionaires and Nobel prize winners [:)]

Of course, there exist many analytic tools out there, many of them rather sophisticated, read, expensive, but it is a complex problem with so much unpredictable factors to evaluate, that they hardly succeed even for small stocks…