Add Dependency

To add a dependency, right-click "Dependencies" and select Add - > New "X" Dependency where "X" is one of the following types of dependency:

There are several types of Dependencies listed below in order of general performance impact (fastest to slowest):

• Process Order

A Process Order Dependency is used to set dependencies between different processes, for example Blasting waits on Drilling. Any model with more than one Process should normally have a Process Order Dependency. Add multiple entries to set up the hierarchy and use Ranges if it changes in different regions.

• Sequence

A Sequence Dependency is typically used to create top-down or bottom-up vertical dependencies between different Tasks within a group. Grouping Expression, Level Direction and Index parameters control how the lists of Tasks are created and in what order.

The most commonly required change is the Level Direction of your Bench if your Bench doesn't follow a logical progress of first to last in the Index (e.g. if the first Indexed Bench in a Source Table is at the bottom instead of the top you would reverse the Level Direction).

• Offset

An Offset Dependency is used to set regular dependencies between Tasks based on one or more Offsets. Commonly used for staggers where there are roughly regular sized Solids/Mining areas.

• Range

A Range Dependency is used to set dependencies between ranges of tasks by explicitly defining Predecessor and Successor pairs. Range dependencies are commonly used to group blocks together to form a single shot together, limit mining in an area until access is established, ensure cast and dozer material isn't blasted until the coal in the previous strip is mined or in situations where anomalies need to be controlled.

• Cone

Cone Dependencies create Dependencies based on the Direction and Angle between Process Centroids. Z Limit and Radius constrain the resulting Cone for performance. A rough guide for the fastest application of this (no excess Dependencies created) is that the radius should be a little larger than your Block or Strip width and the Z level should be about Radius/tan(Angle). If unsure you can always make the numbers a little larger.

• Solid Overlap

A Solid Overlap Dependency compares Solids in Plan View looking up, down or both directions based on a certain Overlap Percentage. The lower the Overlap Percentage the more likely a Dependency will be created. The Expand Option will look further around the Solid and Grouping Expressions are used to improve performance by limiting the number of comparisons required.

The parameters you can set for a Dependency will depend on its type. Click on the following links for more information:

• Range Dependencies

• Process Order Dependencies

• Sequence Dependencies

• Cone Dependencies

• Solid Overlap Dependencies

• Offset Dependencies

Colour

When you add a dependency a unique default colour is applied. If necessary, you can click on the Colour box to choose a Theme, Web or Custom colour. These colours are honoured when you Annotate Dependencies.