Some embodiments include a system. The system can include one or more processors and one or more non-transitory memory storage devices storing computer instructions configured to run on the processor(s) and perform acts including: receiving a request for a picked sales order; estimating an estimated fulfillment time interval to make ready the good(s) of the picked sales order for receipt by the customer, wherein estimating the estimated fulfillment time interval to make ready the good(s) of the picked sales order for receipt by the customer comprises evaluating whether the picked sales order is able to be batched in a picked sales order batch using a k-means clustering to minimize a pick walk of the picked sales order batch; determining a receivable clock time at which to promise the good(s) for receipt by the customer; and communicating the receivable clock time to the customer. Other embodiments of related systems and methods are also provided.