Scheduling Setup: Grade Constraints

To access this screen:

In the Scheduling Setup screen, select the Grade Constraints tab.

Define grade constraints by destination for your scheduling scenario.. These constraints are used to define min/max grade for selected product or element for each destination (processing method or stockpile).

For example, you may have two stockpile destinations for storage and reclaim of low grade Gold and medium grade Gold respectively, for the first 3 years of the schedule. To achieve this, define a grade constraint for each stockpile destination.

You can also define a constant constraint throughout all periods by having a single constraint in the table, and setting the End Period to the final period.

To define a grade constraint for a destination:

Ensure all required destinations are configured in Economic Model Settings.
Display the Grade Constraints screen.
Select a Destination.
Using the table on the right, enter the following grade constraint settings for the chosen destination:
- End Period—The inclusive period up to which the grade constraint is applied for the destination.
- Product/Element—The product relating to the grade constraint.
  
  Note: Products are defined when the block model is initially imported.
- Min Grade—The minimum grade required for material to be sent to the destination.
- Max Grade—The maximum grade for the destination.
Save your settings.