METHOD AND PROGRAM FOR PREPARING COLLECTION/EXCHANGE WORKING PLAN OF LIQUEFIED PETROLEUM GAS CYLINDER AND RECORDING MEDIUM

PROBLEM TO BE SOLVED: To prepare a safe and reasonable cylinder distribution plan according to predicted results by improving the prediction accuracy of exchanging work of liquefied petroleum cylinders at a user's place. SOLUTION: A liquefied petroleum gas dealer 11 sets the next scheduled date for gas cylinder collection/exchange from the past gas quantity consumed at a user's place 12. The gas dealer 11 acquires the check value of a gas meter about scheduled users within a prescribed term, and creates a user group being an object for gas cylinder collection/exchange by attaching priorities. Then, the gas dealer 11 selects a distribution route for gas cylinder collection/exchange, wherein the gas dealer 11 collects the traffic information of a distribution area, event information and information on public facilities, etc., from a municipal Web site 14, etc., and flexibly sets a distribution route so as to be able to distribute gas cylinders in a short time. In such a case, a distribution route of the gas dealer 11 is so designed as not to pass in front of the entrance of schools, a home for elderly people, etc., as far as possible in order to make distribution safety greater. The users are also notified of the scheduled date for gas cylinder collection/exchange work by Web and mail.