Greetings, @suresh.aglawe
My answers in red:
Please let me know is Vault the correct software to be used as a CDE, complaint to BS 1192 and relevant PAS.
Vault Pro. is PDM (Product Data Management) and client-server solution and it can be used as CDE (Common Data Environment), but the implementation depends of factors like: workflows, document lifecycle, BIM applications, change management policies, etc. Currently, Vault is not compliant with BS1192, but it could be configured to comply with this standard.
Can it be used for Asset Lifecycle Information Management?
Is this the solution for Bnetley Projectwise and Assetwise?
No, only for Bentley Projectwise.
For assetwise, you could evaluate a cloud based BIM360 solution
For CMMS (Computerized Maintenance Management System), you could evaluate BIM360 OPS solution
What is the solution in Autodesk for 5D BIM?
For 4D, 5D simulations, you can use Autodesk Navisworks
Hope that helps.