I have the following case. My supply chain is very ideal and with only one selling node and a production node. Transit time between the production plant and the selling depot is 1 day and the production lead time is 1 day. No safety stock is needed as there is (hypothetically) no fluctuations in the system. Can I maintain a parameter of safety stock of zero at depot and plant and still produce the forecast quantity for a month in the previous month? i.e. if a forecast of say 1000 units is needed in December, I need all the stocks to be produced by 30th of November. Can this be done without maintaining a safety stock of 30 days?