Process Blend
The Process Blend constraint allows you to optimise the blend as a part of the value maximisation process. You can select either a non-ratio or ratio blend, as well as the type of weighting applied to the blend.
The process blend constraint is a soft constraint Evolution attempts to satisfy this constraint when generating a schedule but it is not forced..
To create a blend constraint:
-
From the setup configuration tabs, select 7. Constraints.
-
Use the slider at the bottom of the viewer to navigate to Process Blends.
-
Click to add the constraint to your schedule.
-
Under Applied Constraints, click on Process Blend to open the constraint settings.
-
Select the Process which requires a blend using the dropdown menu.
-
Configure the constraint. Either:
-
Control the blend of a single grade item.
Note:This is weighted by the Ore Capacity (tonnes) attribute set in 2. Tonnage & Grade.
-
Ensure the Is Ratio? checkbox is deselected.
-
Select a grade item using the Item dropdown menu.
-
Control the blend ratio between two grade items.
Note:This ratio can be weighted by any numeric block attribute from models in the setup.
-
Select the Is Ratio? checkbox.
-
Select the appropriate variables in the Numerator, Denominator and Weight drop-down menus.
-
-
Control the blend of a single grade item with a unique weight attribute.
Note:As you cannot select a unique Weight when Is Ratio? is deselected, the following steps allow you to create a blend for a single grade item with your choice of weight attribute.
-
Select the Is Ratio? checkbox.
-
Select the attribute you wish to control the blending of using the Numerator drop-down.
-
Create a new denominator attribute with the value of 1. You can do this by entering the following into a maths script:
See Applying a Maths Script for more information on creating new attributes.
-
Select this new denominator attribute using the Denominator drop-down.
-
Select a weight attribute using the Weight drop-down.
-
-
-
In the calendar, under Blend, enter Upper and Lower blend constraints. If Is Ratio? is selected, this value is a ratio.