You use change numbers to create or change data records if the data record is not to be valid for the whole system period.

To create change numbers, choose Environment ® Engineering change management in the Dangerous Goods Management screen.

If you want to work without change numbers, the validity period of the dangerous goods master records created runs from 01/01/0001 through 12/31/9999.

If you want to work with change numbers, you can:

• Create dangerous goods master records with a key date
• Run a data record split on existing dangerous goods master records on a key date.

When a dangerous goods master record is split, its corresponding packaging data records are not split automatically as well. However, you can split packaging data records separately with the same or a different change number.

If you enter a change number as a selection criterion to select dangerous goods master records, the system selects

• The dangerous goods master records that are valid on the key date of the change number, if you are in Change dangerous goods master mode

• The dangerous goods master records that were created with the change number, if you are in Display dangerous goods master mode