Abstract: A system for securely delivering packages of at least two different sizes by a sender to a receiver is disclosed comprising, installing an array of lockers of at least two different sizes with the number of lockers of each size based on a predetermined installed ratio, a central control unit for controlling the locking portions on the array of lockers having a locker optimization unit adapted to use data collected on the frequency of use of each size of lockers to recommend a ratio of lockers of each size to maximize usage of lockers of appropriate size in the array, wherein if the recommended ratio is different from the installed ratio, changing the sizes of selected lockers after installation of the array to better match the recommended ratio by replacing doors without removing hinge pins and moving and re-fastening the top and bottom walls of the lockers.

Abstract: A system for securely delivering packages of at least two different sizes by a sender to a receiver is disclosed comprising, installing an array of lockers of at least two different sizes with the number of lockers of each size based on a predetermined installed ratio, a central control unit for controlling the locking portions on the array of lockers having a locker optimization unit adapted to use data collected on the frequency of use of each size of lockers to recommend a ratio of lockers of each size to maximize usage of lockers of appropriate size in the array, wherein if the recommended ratio is different from the installed ratio, changing the sizes of selected lockers after installation of the array to better match the recommended ratio by replacing doors without removing hinge pins and moving and re-fastening the top and bottom walls of the lockers.