Free SAP ABAP module: work center queue, confirmations, downtime and OEE

What is in the package

The screens are standard ALV lists in English. Run the programs with SA38 or SE38, or give them transaction codes in SE93.

Confirmations post the same way as CO11N

Confirmations go through SAP's standard BAPI_PRODORDCONF_CREATE_TT. SAP first proposes activities and goods movements from the order, so backflushing and automatic goods receipt follow your routing, control keys and BOM exactly as they do in CO11N.

If SAP refuses a confirmation, nothing is posted and SAP's own messages are shown in a list. The BAPI runs the same authorization checks as CO11N.

How OEE is calculated

• Availability is planned minutes minus downtime minutes, divided by planned minutes. Planned minutes per day is a selection parameter with a default of 480. Downtime comes from ZMODMES_DOWNTIME, and a downtime still open counts until now.
• Performance is standard minutes divided by run minutes. Standard minutes are the confirmed quantity (yield plus scrap) times the operation's standard value. You pick which standard value (1 to 6) holds machine time, and the default is 2. Units S, MIN and H are converted. Times in other units are counted in a separate column.
• Quality is yield divided by yield plus scrap.
• OEE is the product of the three.

Quantities come from production order confirmations in table AFRU, by posting date. Reversed confirmations are left out. To try the formula with your own numbers, use the OEE calculator.

Requirements and installation

• SAP NetWeaver or ABAP Platform 7.50 or newer with PP. That is SAP ECC 6.0 EhP8, or SAP S/4HANA on-premise or private cloud.
• abapGit to install it.
• The package reads standard tables (AUFK, AFKO, AFVC, AFVV, AFRU, CRHD, JEST, MAKT) directly, so it does not run in SAP S/4HANA Cloud, public edition, or in the BTP ABAP environment.

1. In abapGit choose New Online and enter https://github.com/modernmes/modernmes-sap and a package. A local package such as $ZMODMES lets you try it without transports.
2. Pull to create the table, data element, classes and programs.
3. If SAP has no internet access, download the repository as a ZIP and import it with abapGit's New Offline.

The package is in beta. The code passes abaplint and the unit tests of the OEE arithmetic, but it has not yet been run on a real SAP system. Try it in a sandbox or test client first, and open an issue on GitHub with what you find.

Good to know

• Writing downtimes is not authorization-checked in the code. Control who may run ZMODMES_DOWNTIME with an authorization group on the program or a transaction code with its own check.
• A work center has at most one open downtime. End it before starting the next one.
• The package does not collect data from machines. SAP users enter downtimes and confirmations.

How it differs from ModernMES

This package covers the basics inside SAP. ModernMES is the full manufacturing execution system that runs next to SAP, with operator terminals at the machine, badge sign-in and barcoded route cards, a live shop floor view, quality and maintenance records, and reports. It connects to S/4HANA through SAP's standard OData APIs, see SAP S/4HANA integration. It runs in the cloud or on your own server, and you can try it free for 14 days.

Frequently asked questions