A warehouse storage and retrieval system includes: an array of multilevel storage racks having at least one transfer deck, picking isles and storage areas disposed along picking isles, the storage areas being configured to hold differing loads, at least one bot disposed on each level of stacked floors of the warehouse storage and retrieval system, each of the at least one bot being configured to transport the differing loads, and characterized in that the system further includes: a controller including a management module configured to variably size the storage areas to the array of multilevel storage rack modules and assign each of the variably sized storage areas to a corresponding one of the differing loads, at least one level managing unit where each of the level managing units corresponds to a respective level of the stacked floors and is configured to manage bot activities for ingress and egress of loads on the respective level, and a managing unit configured to manage at least one continuous lift connecting one or more level of the storage areas with a storage load interface, where the controller is configured to: vary a dimension of each of the variably sized storage areas, combine adjacent variably sized storage areas, size or resize at least one variably sized storage area depending on a size of a predetermined load; and wherein the storage and retrieval system is arranged to transport the differing loads for placement in the variably sized storage areas assigned by the controller. an array of multilevel storage racks having at least one transfer deck, picking isles and storage areas disposed along picking isles, the storage areas being configured to hold differing loads, at least one bot disposed on each level of stacked floors of the warehouse storage and retrieval system, each of the at least one bot being configured to transport the differing loads, and characterized in that the system further includes: a controller including a management module configured to variably size the storage areas to the array of multilevel storage rack modules and assign each of the variably sized storage areas to a corresponding one of the differing loads, at least one level managing unit where each of the level managing units corresponds to a respective level of the stacked floors and is configured to manage bot activities for ingress and egress of loads on the respective level, and a managing unit configured to manage at least one continuous lift connecting one or more level of the storage areas with a storage load interface, where the controller is configured to: vary a dimension of each of the variably sized storage areas, combine adjacent variably sized storage areas, size or resize at least one variably sized storage area depending on a size of a predetermined load; and vary a dimension of each of the variably sized storage areas, combine adjacent variably sized storage areas, size or resize at least one variably sized storage area depending on a size of a predetermined load; and wherein the storage and retrieval system is arranged to transport the differing loads for placement in the variably sized storage areas assigned by the controller. <EOS>