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Optimisation rules set in the Flow Optimisation step tell the software user’s display preferences (grades, blends, tonnes) when calculating destinations and product handling.

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Overview

Flow rules are used to determine the best destination for material at each time step. The best destination is defined as the one yielding the highest positive cash flow, where the cash flow is the sum of all rewards and penalties.

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Typically, a destination will be assigned at least one positive cash flow (reward for sending material), as well as several grade targets (penalties for going off-spec). The optimiser then sieves out a selection of blocks that (if possible) yield high rewards and low penalties.

Destinations with a net negative cash flows are discarded. For example, the crusher may decide not to feed material if the grade penalty outweighs the reward for movement.

Adding Flow Optimisation rule

1. To add the optimisation rule, press the Add Item button and select a type from the dropdown.

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

<The name of (…), is invalid>.

3. Toggle the Enabled flag to enable or disable usage of the Flow Optimisation rule.

4. Click the field in the Optimisation Item column to customise the optimisation rule. Once completed, the configuration field will list all of the populated fields.

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Rule Types

Cash Flows

Cash flow rules define a dollars-per-unit rate on material types conveyed between sources and destinations. Once a rule is configured, the rate is specified in the calendarCalendar.

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