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This paper discusses methods to revise the numbers of e-KANBAN for parts procurement operations from supplier factories. Three policies, i.e. Fixed Interval Review (FIR) Policy, Demand Average-monitored Review (DAR) Policy and Demand Average & Variance-monitored Review (DAVR) Policy are proposed to absorb the fluctuation of parts consumption level, which is created by the downstream shop floor of the production line. The performance of each policy is evaluated by simulation experiments and quantitative trade-off relations between criteria, i.e. Ratio of Line Stops (RLS) and Frequency of e-KANBAN Resetting (FKR), are clarified. Obtained characteristics suggest that DAVR and DAR Policies dominate FIR Policy but each of the former two policies do not hold superiority from the other.