Watch video: CWC meet to take stock of poll debacle, politicos react
Tewari said there is a need to introspect on not only what went wrong for the Congress, but also to find out what went right for the Opposition.
"There is a need for exhaustive process of analysis and exhaustive introspection. It is only through this process that we would then be able to start the process of reconstruction of the party," he told a news channel.
The CWC, which is the highest decision making body of the party, would come up with conclusions on these issues, he said.
The CWC meet on Monday is likely to witness some leaders raising uncomfortable questions about the party's campaign and alliance strategy.
Party sources have already ruled out reports of Sonia Gandhi and party vice president Rahul Gandhi offering to resign in the wake of debacle.