By storing items randomly instead of categorically, the warehouse has a much better flow of material. Even without robots or automation, Amazon can compile a “picking list” that locates where each item needs to be taken off the shelf and scanned again before it can be shipped.
The real advantage to chaotic storage is that it’s significantly more flexible than conventional storage systems. If there are big changes in a product range, the company doesn’t need to plan for more space, because the products or their sales volumes don’t need to be known or planned in advance if they’re simply being stored at random.
Furthermore, free space is much better utilized in a chaotic storage system. In a conventional system, free space may go unused for quite a while simply because stock is low or there aren’t enough products to begin with. Without any kind of fixed positions, available shelf space is always being used.
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