About the Resource Utilization Gantt

The Resource Utilization Gantt is opened by selecting Resource Utilization Gantt in the action bar then selecting one or more resources. It is also possible to select one or more resources and then select the command.

Multiselection of resources is possible for the Resource Utilization Gantt in the tree or the work area. For nonworking resources, make sure that they are selected in Me > Preferences > App Preferences > Simulation > Digital Manufacturing Apps Common Services > Manufacturing Planning Apps Common Services > Resource Gantt.

In this case, the Gantt chart can have several root resources.

Multiselection is allowed: you can open several Resource Utilization Gantt charts simultaneously on different working resources.

You can open a Manufacturing System Gantt at the same time as a Resource Utilization Gantt.

The columns of the Resource Utilization Gantt chart display information about systems, resources, operations, parts, and fasteners. Any of the columns (except Resource-Operation) can be hidden/shown by right-clicking in the header area and deselecting/selecting any of the column check box options.

The columns in this Gantt chart are as follows:

• Resource-Operation: Displays a tree view of the resources and assigned operations. Unassigned operations are also listed in a separate node.
• Duration: Difference between the start and end time.
• Begin Time: Start time of an operation.
• End Time: End time of an operation.
• Idle Time: Time during which the resource is not used.
• Type: Resource type.

  Tip: You can select which resource types to display in the Gantt chart in Me > Preferences > App Preferences > Simulation > Digital Manufacturing Apps Common Services > Manufacturing Planning Apps Common Services > Resource Gantt.

• Utilization: Percentage of time that a resource is used.
• Associated Parts: Instance names of the assigned parts of an operation. Parts may appear as a list with a separator.
• Type of Time: Estimated, simulated, or analyzed time of an operation.
• Number of Fasteners: Displays the number of assigned fasteners for operation and resources. The first number on the resource indicates the number of fasteners assigned directly to this resources behavior. The number in brackets is the sum of the fasteners assigned to the resources direct behavior and all fasteners assigned to all child behavior.
• Number of Spots: Displays the number fastener spots.
• Localization Resource: The organizational resource assigned to the operation.
• Used Resource(s): The nonworking resources assigned to the operation.
• Resource used for positioning: The resource used for parts positioning for a given operation.

To change the column size, place your cursor over the edge of the column, the cursor changes to arrow shape. Move the cursor left or right to change the column size.

To move a column, select the column, the cursor changes to hand shape. Move the selected column to left or right as required.

Note that you can use the Customize Column(s) contextual command to customize the columns of the Gantt chart with operation, system, and resource attributes or any new customized attributes.

A set of contextual commands is available for expanding and collapsing the tree in the Gantt chart.

When you right-click any row of the Gantt chart, the following commands are available in the Tree Expansion contextual menu:

• Expand First Level: Displays the first level child row.
• Expand Second Level: Displays the first and second level child rows.
• Expand All Levels: Displays all the child levels of the selected row.
• Collapse All: Collapses the row and hides all its child rows.
• Expand Selection: Displays a Specification depth dialog box where you can specify a tree depth for the expansion. You can select one of the available depth levels (1 to 5) or all levels, or key in a positive number.

For a given working and nonworking resource, the Resource Utilization Gantt displays the list of operations that it executes. It takes into account the other working and organizational resources thataggregate the working resource.

Operations can display in a collapsed or expanded view. Error cases (overlapping operations, for example) are highlighted in red.

The cycle time of systems is displayed in the Resource Utilization Gantt.

Cycle time is displayed by two vertical green cycle bars. They appear for leaf organizational resources and their children. The cycle time is the one inherited from the organizational resource that has the scope with a system. This resource has the same cycle time as the system.

You can use the Resource Utilization Gantt to assign operations to a resource. You can use dragging to assign or unassign operations in the Gantt chart.

If you use a command available outside the Gantt chart, you can select the operations in the Gantt chart after launching the command.

Constraints are always taken into account, whether the status of the operation is assigned or not.

Unassigned operations are listed in an independent Unassigned Operations node and so are available to be assigned to resources.

Unassigned operations are:

• Operations that are defined in a system but are not assigned to any resources.
• Operations that are assigned to hidden resources. To make sure that the resources are visible, select the resource type in Me > Preferences > App Preferences > Simulation > Digital Manufacturing Apps Common Services > Manufacturing Planning Apps Common Services > Resource Gantt.

You can use dragging to manage operation-resource assignments.

Assign an operation to a resource

Drag an operation in an Unassigned Operations row and drop it on a resource.

Unassign an operation from a resource

Drag an operation that is assigned to a resource and drop it in an Unassigned Operations row.

Balance an operation from one resource to another one (same type of resource)

Drag an operation that is assigned to a resource and drop it on a resource row.

If the resources are different (working and nonworking resources), the operation is assigned to both resources. The Gantt chart shows two instances of the assigned operation, one under each resource row. The start and end positions of the operation are the same in each row.

Assign an operation to an additional resource

While keeping the Ctrl key pressed, drag an operation that is already assigned to a resource and drop it on another resource row. The Gantt chart shows two instances of the assigned operation, one under each resource row. The start and end positions of the operation are the same in each row.

Unassign an operation that is assigned to several working resources

Drag the operation and drop it in the Unassigned Operations row. All assignments to the resources are removed. The row from which the operation was dragged is removed and the operation appears in an Unassigned Operations row.

You can select several operations to assign or unassign them by pressing Ctrl.

Three kinds of links are available between operation and resource:

• Execute
• Used
• Where

Each operation in a Resource Utilization Gantt has two resource columns: Used Resource and Localization Resource. The Executing resource is implicit, as this is the resource that has the operation as a child.

A time mode is specified on operations. The Type of Time column is available for operations and displays the specified time mode.

The different time modes are as follows:

• Estimated time is user-defined (the default value is 10 seconds).
• Simulated time is the result of a simulation.
• Analyzed time is the result of a time analysis.
• Work Instruction shows any work instructions under the operations in the Gantt chart with estimated time.