Vorranggraph

Visualize the sequence with a precedence graph in the assembly

Why a precedence graph?

In principle, there is a wide range of applications in the industry for planning assemblies. These are sometimes complex and require consistent adherence to sequences within the assembly. For this reason, it always makes sense to work with a strict sequence of steps and to determine a priority graph from this.

Example of a priority graph in automobile production

Activity Description Execution time Previous steps
A Base plate 3 -
B Axes 3 A
C Engine 4 A
D Gearbox 6 A
E Wheels 8 B
F Steering rod 3 C, D
G V-belt 2 D
H Body 5 E, F
I Lighting system 6 G
J Window 1 F, H, I

Use of a priority graph in planning

Whether the assembly of an individual component or an entire product is to be planned - the assembly sequence is clarified and determined during the planning phase. The exact sequence of the components to be assembled is essential, as in most cases this is the only way the components can be assembled in the desired quality and quantity.

The priority graph shows graphically which processes can start strictly one after the other or at the same time. It also shows processes that must be completed before a new process can begin. This makes it possible to determine whether all parts required for assembly were also included in the planning.

Advantages:

  • Logical processes during assembly are determined

  • Saving of working time and possibly unnecessary equipment in the process

Challenges:

  • Investment costs are higher when this evaluation method is included than without

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