Digital twin: KHS lowers fault-related costs with virtual machine commissioning

With the help of smart, digital technologies KHS is networking and automating production processes step by step so that machines, products and complete lines can efficiently communicate and work with one another. “In particular what's known as the digital twin enables procedures to be transferred to a virtual environment by tracking and imaging all phases in a machine’s life cycle. All production processes and products can then be simulated virtually,” says Stefan Diesner, head of the Palletizing Product Center. Alternative, optimized production processes are displayed on the computer.

One of the major prerequisites for this is that engineering is consistent throughout the entire value chain in order to prevent what is known as data discontinuity at the interfaces between the various engineering disciplines, namely mechanical components, electrical equipment and software. Unlike the way a lot of work is done today, projects are not processed sequentially, i.e. separately and consecutively. Instead, in an ideal scenario all departments work in parallel across their respective disciplines on the implementation of a project and share a common data model – the basis for the digital twin that depicts every last detail of a system virtually and permits precise simulation.

The shared data challenge

For an engineering company like KHS, which not only manufactures a huge number of different machines but whose research and development departments also have a colossal geographical spread, this is a major challenge. The KHS engineers at the Palletizing Product Center in Worms have been working on the virtual depiction and simulation of machines and system parts for 13 years now. Simulation or virtual commissioning especially lend themselves to use with logistics systems such as palletizers or conveyors.

“Our aim is to continue to shorten lead times and lower fault-related costs by expanding our virtual commissioning setup,” explains Diesner. In order to estimate just how high these savings can be, it helps to take a look at the rule of ten. This states that the cost of fault correction increases by a factor of ten the later in the process an error is discovered. If a fault is only found and eliminated during factory commissioning, for example, the financial burden is ten times higher than if the correction had already been made to the software engineering during virtual commissioning.