Consumption forecasting from issued quantities
The only figure that predicts next quarter is what left the building last quarter. Ordered quantity predicts nothing, because it reflects a decision made by one person on one day rather than a rate at which goods are consumed. The forecast should therefore be built from issued units, adjusted for known movements in the population being served: a new office opening, a team restructuring, a seasonal campaign, a recruitment freeze. Where the underlying record is thin, the useful first step is not a better model but a longer record, because most corporate programmes have fewer than eight quarters of usable history and a single quarter of data is not a rate.