| 摘要 |
PURPOSE:To restrain the increase of delivery date lag jobs by monitoring and comparing the number of jobs stagnated in buffers between processes with the number of predetermined jobs in precalculated time series to advance or retard the job commencing time if the discrepancy between both numbers is large. CONSTITUTION:The number of accumulated job units stagnated in a buffer between respective processes in a production system is collected on line by a job monitoring means 1 to accumulate the number of jobs at the collecting time in a file 5. Then, a job comparing means 2 compares on real time the number of respective jobs in the actual job performance file 5 in the buffer with number of predetermined jobs calculated previously at the production schedule preparation in the corresponding time in a file 6. When both numbers are not equal to each other, a job selecting means 3 compares the difference between both numbers with an estimation reference value in a file 7. When the difference is larger than the reference value, the process on the production system is controlled by a process control means 4 to cause the actual performance number of jobs to approach the predetermined number of jobs, Thus, the delivery data lag jobs can be restrained from increase. |
