The operation precedence graph is used to create/edit the model of the assembly process to be executed on the line. The graph is accessible in the Operations Tab. The precedence graph is interpreted as follows:

• Each box represents an operation. The text written in the box depends on the view preferences chosen (Number,Name,Code,Zone or Position). Each arrow represents a precedence. In this example, the "Oper 4" and "Oper 5" must be completed before the "Oper 6" can begin.
  
• The color of each box shows the type of the operation. In the above figure, all blue operations are "Manual" and the gray one is "Robotized". A red or light green box on the right side of an operation means that this operation is assigned to a particular workstation. For example, the operation "Oper 3" is assigned to the workstation 1. If the box is colored red, the operation is unmovable. It means that the optimization algorithm must keep this operation on this station. For example the operation "Oper 4" is assigned to the workstation 2 and can't be assigned on another workstation.(learn more about movable / unmovable operations here). You can turn on and off this indication in the view preferences part of the menu operation.
  
• A box on the left part of an operation means that the operation is linked with one or more other operations. In the above figure, the operation "Oper 7" belongs to the green link.
  
• A light red box under the operation with a 'F' inside, means that the operation is fixed. This means that once the operation has been assigned to a workstation, no other operation can be added to this workstation. For example, the operation "Oper 7" is fixed.
  

• To learn more about Operation selection click here.

Implicit Variant Mode

    If you switch to the variant representation of the graph using the variant navigator, each operation will be colored with the selected variant. If an operation does not belong to the current variant, the operation will red crossed as shown in the following picture.

Operation Variant

• To learn more on implicit variant click here
• To learn more about how to edit operations variant click here

Explicit Variant Mode

    If you switch to the variant representation of the graph using the variant navigator, each operation will be colored with the selected variant.

• To learn more on explicit variant click here
• To learn more about how to edit operations implicit variant click here