Decision Atlas
DEM

Demand

What customers will want, when, and how sure we can be.

12 stops, 12 ready to read

  1. Stop 1

    Forecasting fundamentals

    What a demand forecast is made of, and why the decision it feeds sets its horizon and level of detail.

    3 levels, 11 min in full

  2. Stop 2

    Demand patterns & classification

    Smooth, erratic, intermittent or lumpy. Classify each item's demand first, because the class decides which methods can work.

    3 levels, 9 min in full

  3. Stop 3

    Exponential smoothing & ETS

    SES, Holt, damped trend and Holt-Winters, all built on one idea, plus the ETS family that ties them together.

    3 levels, 10 min in full

  4. Stop 4

    Intermittent demand: Croston, SBA, TSB

    Forecasting spare parts and slow movers that sell in occasional bursts with long gaps in between.

    3 levels, 11 min in full

  5. Stop 5

    ML & global forecasting models

    Gradient boosting, deep learning and foundation models that learn across thousands of series at once, and when they actually win.

    3 levels, 11 min in full

  6. Stop 6

    Forecast accuracy & bias

    MAPE, WMAPE, MASE, bias and tracking signal, what each one really measures and when each one misleads.

    3 levels, 11 min in full

  7. Stop 7

    Probabilistic forecasting

    Forecasting a range of outcomes and its quantiles instead of a single number, so stock can be set for the risk you choose.

    3 levels, 9 min in full

  8. Stop 8

    Hierarchical forecasting

    Making forecasts for SKUs, regions and the total add up: bottom-up, top-down, middle-out and optimal reconciliation.

    3 levels, 9 min in full

  9. Stop 9

    Promotions, cannibalization & halo

    Estimating how much extra a promotion sells, the dip that follows, and what it does to related products.

    3 levels, 10 min in full

  10. Stop 10

    New products & phase-outs

    Forecasting launches with no sales history, and running old products down without dead stock or lost sales.

    3 levels, 10 min in full

  11. Stop 11

    Demand sensing & shaping

    Reading the latest short-term signals to correct the near-term forecast, and using price and promotion to steer demand toward supply.

    3 levels, 10 min in full

  12. Stop 12

    Consensus forecasting & FVA

    Letting sales, marketing and planner judgment into the forecast only where it actually makes the forecast better.

    3 levels, 9 min in full

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Safety stock covers the surprises while you wait for a delivery. It grows with the square root of lead time, not with lead time itself.

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