General Haul Truck Settings

To access this screen:

On the Schedule ribbon, select Setup, then select any haul truck item on the left.
On the Update Schedule screen, enable the Haul Trucks option, then click the browse button.

Use the General Haul Truck Settings screen to define details for each haul truck class. These settings form part of the General Settings screen for each truck.

You can associate various properties for a haul truck class, including specific settings for a nominated time period. You can also associate an existing maintenance calendar with a truck class.

Maintenance Calendars

You can associate a Maintenance Calendar with the Haul Truck ID to define planned maintenance events.

Availabilities, Efficiencies And Utilisation Calculations

You can enter Mechanical Availability, Use of Availability, and Operational Efficiency (all as a percentage) for individual periods or ranges of periods. For example, if the first End Period is 10, these values apply to Time Periods 1 to 10. You can then enter different values with a second End Period of 99 to apply to Time Periods 11 to 99.

Utilisation (%) is calculated as follows: Utilisation = Mechanical Availability × Use of Availability × Operational Efficiency.

Your application uses utilisation to calculate operating hours as follows: Operating Hours = Utilisation × Calendar Hours.

The capacity for a truck class is calculated as follows: Haul Truck Class Capacity = Operating Hours × Rated Capacity × Number of Units.

You can use the capacity of the truck class in the schedule as a target. Warning messages are issued if the capacity is exceeded.

Activity steps:

Display the General Haul Truck Settings screen.
In Haul Truck ID, enter a unique name for the truck class, then set the Abbreviation used when displaying the haul truck symbol in the 3D window.
In Rated Capacity, enter the rated capacity (tonnes/load) of a single truck in the selected haul truck class.
- Select Tonnes/Load to set the capacity units to tonnes/load.
- Select Volume/Load to set the capacity units to volume/load.
If required, in Adjustment Factor, select the table column that contains adjustment factor values.
If required, in Maintenance Calendar, select a maintenance calendar from the list.
In the General Settings grid, define the parameters for each period.
- End Period – For each record, enter the end scheduling period for which, or up until which, the associated availability, efficiency, and utilisation parameters apply.
- Units – Enter the number of trucks in the selected haul truck class required for the specified period (default is 1).
  
  This changes the capacity hours for the machine class. This methodology mainly applies to medium term planning where the machine fleet size varies over time as new units are purchased or decommissioned.
  
  You can also achieve this by modifying utilisation period by period, but this is not a recommended method.
  
  This methodology may also be useful for short term planning where you want to model the number of haul truck units day by day. However, it is usually better to keep the number of units fixed and vary mechanical availability day by day according to the planned maintenance schedule.
  
  Using a maintenance calendar to control the number of available haul trucks is not recommended because it means the whole fleet is down during a planned maintenance event. You usually want to model a partial fleet.
- Avail % – For each period, enter the mechanical availability (%) of the truck class.
- UoA % – For each period, enter the use of availability (%) of the truck class.
- OpEff % – For each period, enter the operational efficiency (%) of the truck class.
- Utilisation % – Review the automatically calculated utilisation (%) for each period.
- Cost/Hr – If relevant, enter an associated cost for the truck for the nominated time period.