There are many ways to engage private sector during PPP project development phases. Prior to procurement stage, private sector is usually involved in through market sounding or similar convention, followed by an expression of interest. During the procurement stage, private sector are welcomed to make enquiries on the bid, and to review the feasibility study and preliminary plan. They may also access the latest information on the PPP project through official website at any time. These mechanisms are implemented in almost all of economies observed.