The bullwhip effect was named by analogy with the way in which the amplitude of a whip increases down its length; the further from the originating signal, the greater the distortion of the wave pattern. In a similar manner, forecast accuracy decreases as one moves upstream along the supply chain. For example, many consumer goods have fairly consistent consumption at retail, but this signal becomes more chaotic and unpredictable as the focus moves away from consumer purchasing behavior. - Wikipedia
'Forecast accuracy decreases'. Just understand that there is no inflation, but deflation, no matter what the media says.