The critical ratio determines the priority of the order.
= 1, the order is on schedule,
> 1, the order is ahead of schedule
< 1, the order is behind schedule.
Earliest Due Date
The order with the nearest delivery date is given the highest
priority
Priority of Prod. Order
When you create or modify production orders in the Production Orders (tisfc0101s000) session, you can assign a priority to the order in the Priority field.
Shortest Total Rem.Prd.Tm
The orders with the shortest time remaining to complete their
production are given the highest priority, regardless of their delivery dates.
Slack Time
Slack time = (end date - reference date) - remaining production
time