Patent ID: 7729936
Filing Date: 2010-06-01
Classification: G06Q

Abstract:
1. A computer-implemented method for lot priority adjustment for use in a computer including a calculation unit, and an adjustment unit, wherein the computer is programmed to perform the steps of: receiving a throughput rate and a cycle time for respective route operations in a production line, and Work-In-Process (WIP) information of the production line from the production line by the calculating unit; calculating an x-ratio for a lot on a target route operation according to a current time, a committed date and a remaining cycle time for the lot by the calculating unit; calculating a lot weight for the lot according to current loading of a predetermined number of route operations subsequent to the target route operation by the calculating unit, wherein the current loading of the predetermined number of the route operations subsequent to the target route operation is derived from the WIP information of the production, and the lot weight is calculated as follows: wherein LW is the lot weight, n is the predetermined number of route operations subsequent to the target route operation, ω wherein P is a period including the total cycle time of the route operations 1 to n subsequent to the target route operation; calculating a weighted x-ratio according to the x-ratio and the lot weight by the calculating unit; transmitting the weighted x-ratio to the adjustment unit by the calculating unit; and adjusting a priority for the lot according to the weighted x-ratio by the adjustment unit.