Hi Devi,
EHS is the old and existing solution from SAP. There is no seperate licence required, it is part of ECC. It deals with
- Product safety
- Dangerous Gooda Management
- Hazardous substance Management
- Industrial Hygiene and Safety
- Occupational Health
- Waste Management
- Basic Data and Tools(to support the above sub modules)
http://help.sap.com/saphelp_ehs27b/helpdata/en/A5/3ADD4643BE11D188FE0000E8322F96/frameset.htm
EHSM (SAP EHS Management), is new solution from SAP. There is a seperate licence required for SAP EHSM. It is not part of ECC. This is SAP Netweaver portal based solution. EHSM deals with .....
- Incident Management
- Risk Assessment
- Product Compliance
http://scn.sap.com/community/ehs-management/blog/2012/12/13/enhancing-sap-ehsm-overview
http://help.sap.com/saphelp_ehsext30/helpdata/en/5b/22b8d6606b4d32b8af9283901d3bdc/frameset.htm
http://ecohub.sap.com/api/resource/4e3a6f1c93aadee75f662908
Typiccally SAP EHS and EHSM are diferent solutions from SAP to support differnt modules in SAP.
IHS is the component which falls in both SAP EHS and EHSM and it is going to be replaced by SAP EHSM - IM.( I dont know how far SAP Product Safety in SAP EHS is related to Product Compliance in SAP EHSM)
If you wants to start a new projetc in the area of EHS-IHS then you should take a look on EHSM.
SAP IHS classic (Industrial Hygiene and Safety) will get only bug fixes by SAP in the future. There will be no new functionality. The new and only tool which will be enhanced etc. in the future will be EHSM actually in
version 4.0
You will find some threads regarding EHSM here as well dealing with "migration" from EHS IHS classic to EHSM.
Reference:
http://scn.sap.com/thread/3300367
Thanks
Sagar Pilli