AI article
S&OP Engineering II: Demand Planning from Guessing to Probability
Community description: Your Excel says "we'll sell 100 units." A round, clean, deterministic number. What if you sell 120?...
Dev.to | Mar 7, 2026 | Daniel
Automated excerpt
Executive Summary: A probabilistic forecast doesn't tell you "you'll sell 100. " It tells you "with 95% probability, you'll sell between 35 and 157. " That uncertainty band is the mathematical foundation for calculating your Safety Stock without resorting to rules of thumb. This is literally your calculation basis for Safety Stock: Safety Stock = yhat_upper - yhat. The shaded band is the 95% confidence interval.
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