It's not necessarily an either/or -- your MES system should give you the flexibility to vary the display by department. That way you could provide many of the workstations with a look-ahead, as long as the first workstation did [U]not[/U] see a look-ahead. Generally speaking, if the first workstation completes and releases orders according to the scheduled sequence (which they would have to do if they don't see a look-ahead), then that should dictate the sequence which the downstream workstations must follow (even if they do see a look-ahead).
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