In an open bid or tender system, a double envelope system may be used. The double envelope system separates the technical proposal (based on and intended to meet the statement of work) from the financing or cost proposal in the form of two separate and sealed envelopes.
During the tender evaluation, the technical proposal would be opened and evaluated first followed by the financing proposal.
The objective of this system is to ensure a fair evaluation of the proposal. The technical proposal would be evaluated purely on its technical merits and its ability to meet the requirements set forth in the Invitation without being unduly skewed by the financial proposal.