Achieving Monetary policy objectives is a long shot rout with difficulties and uncertainties due to ever changing macroeconomic dynamics.In recent years,however,majority of central banks have adopted four monetary policy regimes or strategies to enhance their ability in achieving these goals.Describe four Monetary policy regimes clearly showing how they integrate the goals of monetary policy and possible information variable at the disposal of central bank used to monitor and direct changes in monetary policy.

Any economists in this forum to kindly assist me on this.
Thanks.