VDMA standard sheet 66412

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The VDMA standard sheet 66412 contains a collection of economic key figures for the area of production control and monitoring for the assessment and definition of the objectives of production processes.

MES key figures on the way to the international standard

The International Organization for Standardization, ISO for short , has been dealing with standards for industrial automation at TC 184 for many years. The working group "AK3" was founded in 2007 within the standardization committee NA 060-30-05 at the German Institute for Standardization . In the course of the standardization work, the following questions should be answered by the working group:

  • What are the contents of an MES (Manufacturing Execution System)?
  • How does the MES differ from other company software components?
  • How is horizontal integration defined along the material flow and the value chain ?
  • Which key figures does an MES provide?

MES key figures as relevant control instruments for companies

In 2009 the members of the working group dealt with the question of which key figures should be standardized for an MES. An interesting finding was that both the terms defined in the last few decades and their key figure formulas have been used in a wide variety of interpretations. On the one hand, one finds different definitions under the same term, such as “productivity”, on the other hand, different terms are used for one and the same definition. These ambiguities have now been standardized and published by the VDMA as standard sheet 66412 Part 1 so that the results are available to the market as quickly as possible. At the same time, this standard sheet serves as a clear working basis for the international standardization of the KPIs (Key Performance Indicators) of MES.

Definition of key figures

When making the specifications, a differentiation was made between MES key figures and other key figure systems, such as those used in Enterprise Resource Planning (ERP), Product Lifecycle Management (PLM) or in the automation area. The basis for this is the so-called " drill-down ". This describes how to get further detailed information from the generated key figures. The initial situation: If a key figure is outside its limit, the user needs detailed information in order to determine the cause and to initiate corrective measures. This basic data can contain, for example, measured values ​​from the test system of a plant or also attribute error analyzes in the form of Pareto diagrams . To make this possible, an MES must save the entire data reference across all systems. Enterprise Resource Planning systems are usually not designed for such detailed data analyzes within their own database . The functionality for determining statistical key figures in Enterprise Resource Planning is also not available (e.g. process capability values ). The second basis of definition is the point in time at which a key figure is calculated and for whom it is intended. Among other things, online key figures for the production employee level or real-time reports for management are mentioned here.

Application worlds merge into MES

In summary, MES key figures are defined on the one hand via integrated data management including extensive detailed information from the individual data sources. On the other hand, the time behavior plays an important role in the definition of key figures, which is usually in the range of minutes or even seconds. These definition parameters leave room for an interesting market development in the field of enterprise software. Just as the IT systems for logistics , materials management / production planning (PPS) and financial accounting were merged under the umbrella term ERP in the 1990s, similar integration processes take place in the MES environment: applications for Computer Aided Quality (CAQ), operational and Machine data acquisition (BDE and MDE) as well as for traceability and action management are combined under the umbrella term MES. A third major integration process can be observed in the development area under the term Product Lifecycle Management. Various components of Computer Integrated Manufacturing (CIM) are also brought together here. These include, for example, Computer Aided Design (CAD), Computer Aided Engineering (CAE) or the construction FMEA .

The standardized key figures

International standardization

At the beginning of March 2009, this working basis was also made available to an international working group on performance indicators (KPIs for short) in ISO / TC184 / SC5. In March 2009 the opening meeting of the group took place in Frankfurt . Representatives from China , Germany , France , Japan , South Korea and the USA have decided to derive a New Work Item Proposal (NWIP) for an international standard from this. At the beginning of February 2010 there was the first international meeting of the WG9 working group, in which ISO 22400-2 was created on the basis of the German standardization proposal (NWIP) with additions from the working groups of the other participating countries. The countries France, China, Korea, Japan, USA, Spain , Sweden and Germany were represented, as well as MESA International as a liaison.

This also creates an internationally uniform basis for the user, which allows him to read the functionality and application area of ​​performance indicators for MES. If these standardized MES key figures are offered by standard software manufacturers, the user can also request the functionalities that correspond to the standard. Another advantage is that the international standardization makes the key figures comparable. Companies no longer have to derive and possibly transform the definition of the individual key figures themselves in order to be able to compare international production plants.

This standardization is intended to ensure that MES key figures are clearly defined and that the market can thus assume a uniform basis. It goes without saying that both providers and users can add individual key figures. However, these should then be conceptually differentiated from the standard. This is the only way to create clarity in the market for both providers and users regarding the use and effectiveness of key figures in MES.

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Individual evidence

  1. ↑ http://www.iso.org/iso/standards_development/technical_committees/list_of_iso_technical_committees/iso_technical_committees.htm?commid=5411  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.iso.org  
  2. ↑ ISO / TC 184 / SC 5. Interoperability, integration, and architectures for enterprise systems and automation applications. International Organization for Standardization, accessed January 3, 2018 .
  3. ↑ http://www.iso.org/iso/catalogue_detail.htm?csnumber=54497