In which situation you need to “migrate” data to EHS classic?
1.) you are trying to consolidate your SAP landscape
2.) you have acquired a company and you need to migrate the data in your SAP system
3.) you would like to get rid of old legacy systems
Consolidation of SAP landscape
Here in most cases you use either at least two clients in the same SAP system or you use two SAP systems. In most cases: there is no data exchange done yet between the systems. So any of the “clients” contains some data, which is not the same as in comparison to a different client. On the top: may be you use “SERC” service in one SAP client but not in the “other” SAP system.
The first step in consolidation is: you need to decide which SAP system will be used in future (new target system) and which SAP system will be stopped for use (source system of data). Luckily: you have two SAP systems to consider. Therefore: you have the same data model in both systems.
The specific roadmap to use for data migration depends on the used modules. In most cases:
The “core”modules are used (e.g. to support MSDS/SDS generation, dangerous goods management, SVT, GLM).
Therefore. if you would like to migrate you need to check for:
Customizing differences (different identifiers, property tree etc. etc.)
Now what is a “good” approach to start migration? There is no easy answer. But if you start to migrate phrases, and if you take care regarding “customizing” differences, you have done a good job. But what will come next? What you can do easily: you can “download” the data from source system (EHS Export). But in > 80% of the cases you can not upload the data in target system without “adaption” of the data (which is called “mapping” of meta data). This is now 80% of the work as we do not have any kind of SAP tool to support. Therefore: this is quite customer specific. But if you suceed: you will create e.g:
stuff quite easily either using EHS import or OCC
You need to decide by your own if you would like to migrate released WWI reports.
Acquisition of a new company
There is a good chance that there is no “SAP” system. If you are lucky then you can extract data using e.g. an “EXCEL” format. A big challenge is to understand the “source data structure” to planethe migration. To analyse and prepare the source data to migrate is the highest effort you can think of. But at least: you must as well define the target scenario in your SAP system. As we have to many source systems to discuss: this is a very specific project having many risks to consider.
Removal of old legacy systems
Here nearly the same challenges can be listed as before. The only difference (luckily) is: you know very well your old systems and the options to extract data.
But as well: you need to consider a huge amount of work for “mapping” (old data structure to new data structure). It is as well a good idea to do the migration (if possible) step by step (e.g. start with phrases etc.).
Most of the work to consider is done in relation of “mapping” (source system data structures <=> target system data structures ), defining the “target structures” (do you need nw customizing?), what need to be migrated (from source system), in which sequence should the migration be done? How to train the new users (in SAP)?
As EHS is directly linked to SAP MM: you can start the migration only of you have good competencies (link of MM to EHS) in SAP MM as well. The effort involved depends clearly on the “modules” of interest (e.g. EHS-BD, EHS-SAF, etc.)