Patent ID: 7277774

Claim:
A transportation state notification system comprising: event detection means for detecting a plurality of types of events relating to lot transportation occurring in a temporary storage devices; storage means for storing lot state data indicating a transportation state of each of the lots; update means for updating the lot state data based on the events detected by the event detection means; and state notification means for displaving an image based on the lot state data, wherein the lot state data includes data indicating an event transition of each of the lots, wherein the state notification means determines whether the lots are in a state of either “under transportation” or “awaiting transportation” based on the data indicating the event transition, and displays an image showing a state of a target lot at a predetermined time as the image showing the transportation load state, wherein the state notification means calculates a transportation load index based on a ratio of a total number of the lots to a number of lots in a state of the “under transportation”, and wherein the state notification means displays an image showing the transportation load index as the image showing the transportation load state.