receiving, by at least one processor configured by executing instructions stored on processor readable media, information associated with an upcoming arthroplasty and demographic factors of a patient in the upcoming arthroplasty;

accessing, by the at least one processor, i) procedure information representing arthroplasty previously performed for each of a plurality of patients and ii) implant information representing types and sizes of implants from a plurality of manufacturers;

determining, by the at least one processor, respective unadjusted probabilities of each of a plurality of implant size options within a range of implant sizes, based on i) of at least one statistical model, ii) the accessed procedure information and the implant information, and iii) the demographic factors of the patient;

generating, by the at least one processor, information representing some of the respective implant size options and unadjusted probabilities; and

transmitting automatically, by the at least one processor to at least one computing device associated with an inventory control system, the generated information.