Which factor is most crucial for determining storage capacity?

The crucial factor for determining storage capacity is the dimensions of aisles. Aisles play a significant role in how efficiently space can be utilized. When aisles are too narrow or too wide, they can limit the overall density of stored items and affect accessibility. Adequate aisle width allows for safe movement of equipment such as forklifts and ensures that products can be retrieved efficiently.

In contrast, while the type of storage method can influence efficiency and organization within a facility, it does not solely determine capacity. Height of storage units and material types also contribute to capacity but to a lesser extent compared to aisle dimensions, as they primarily pertain to the product being stored and the maximum height that can be utilized safely. A balanced approach that includes appropriately sized aisles ensures optimal use of vertical and horizontal space, ultimately leading to a greater storage capacity.