Hi Sameer
LAM is amn extension of all o fthe previously existing PM/EAM processes. For example, if you have a process called maintenance works management or if you have a process called master data management, these will not be impacted at the process level. The impact will be at the transactional level by which the transactions like orders, measurement document creation will have additional functionality.
There are plenty of documentation and web sites in which you can find lots of details:
Linear Asset Management | Enterprise Asset Management | SAP
http://help.sap.com/saap/sap_bp/BBLibrary/Documentation/D61_ERP606_BPD_EN_AU.doc
Cheers
Savas