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Table of Contents

Overview

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2. Name the rule clearly. Avoid using commas in the Product Specification rule name, otherwise you will get an error message preventing you from going past this step:

<The name of product specification (…), is invalid because it contains invalid characters>.

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Item

Description

Example

Specify Min

Limits minimum ratio of the material fed from the Source to the Destination.

Note

Crusher feed will be zero if it cannot satisfy a Minimum blend ratio. Make sure there is material available before setting a minimum feed ratio. 

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Specify Max

Limits maximum ratio of the material fed from the Source to the Destination.

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  • Minimum and Maximum are hard limits, “Actual” values cannot be outside of these boundaries.

    • If Minimum limit cannot be satisfied, the optimiser returns zero.

    • If Maximum limit is reached, no more material can be sent to the specified destination.

  • Note that when setting ratios for multiple plant components, their “Actual” values must add up to 1.

Specify Target

Specifying target also introduces “Content Deviation Penalty” input row in the Calendar.

The difference between the Actual and the Target blend is subject to this Penalty multiplier specified by the user.

The Penalty is summed with the Cash Flows to determine the reward or cost of blending materials into each Destination.

The higher the deviation penalty, the better the optimizer will try to meet the target, but it may not be achieved due to other cash flows and objectives.

Show Tram Lines

Displaying additional guidance rows for the optimisation rule in the Calendar.

Used for visual purposes only to change the color of values in the “Actuals” field, i.e. if it goes out of range by more than 0.0001 it goes red, less than orange, otherwise it's black.

Numerator and Denominator

Blend ratios are calculated using a Numerator and Denominator, as such the setup requires both to be populated.

Note

Never configure the Denominator in a way that could return a zero. If the ratio returns a "divide by zero", then crusher feed will be zero.

Destinations

The Destination(s) to which the blend target is applied.

Quantity Field

The field to which the blend target is applied.

Tip

As a general rule, the Numerator and Denominator should use the same units (either dry tonnes for the strict ratio, or wet tonnes for the weightometer ratio).

Sources

The Source(s) for Numerator and Denominator to which the blend target is applied.

View Database

Use the View Database button to open the Choose Records window, where you can graphically select and review the Sources.

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Tip

Grade targets allow the user to specify a strict grade range, and place penalty multipliers on deviation from the Target.

Different Destinations may have different Grade targets.

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Grade Fields

Grade specifications can be set to reference any field in the database.

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