3 Types of Buffers
(
Inventory Buffer
+
Time Buffer
)
×
Capacity Buffer
=
Total Variability
Overall Scale
Total Variability
Rectangle area grows or shrinks; width unchanged
Width
Capacity Buffer
Width changes; height adjusts to preserve area
Height Distribution
Inventory (Stock) Buffer
Green share — Time Buffer mirrors automatically
Time Buffer
White share — Inventory (Stock) Buffer mirrors automatically