• 40% - Building
• 40% - Personell
• 10% - Rack Structure
• 10% - Forklift Vehicles

It follows that space reduction to the absolute minimum requires a more detailed and precise planning.

It is equally important to minimize the traffic aisles and staging areas as well as reducing the storage areas.

The Planning also requires a balance between various related factors to achieve a comprehensive solution. 

• Building: Height vs. Area - depending on the geographical region - the same building volume with a reduced surface area and higher ceiling height can be less costly to build.
• Fire Protection: at certain storage heights a sprinkler system may be required
• Safety: corporate and insurance concerns as well as a general safety awareness drive the safety system requirements - most narrow aisle systems have included a planned safety profile while general traffic contends with rules of the road
• Vehicles: the forklift truck selection is based on lift height, capacity, throughput capability and aisle requirements all other items being equal