The opposition alliance, with a majority of 11 seats on the committee, unexpectedly submitted to the vote.
Chen said the absence of five opposition lawmakers' from the review gave the pan-greens an advantage.
The forming of a pan-blue alliance for next year's presidential election has given the opposition a numerical edge of 112 seats at the legislature. The pan-greens have a total of 101 seats.
Chen said there was pressure within his party as well as in the pan-green parties concerning mobilization orders.
"The numerical confrontation has worsened the legislative efficiency in this session after the pan-blue alliance applied the tactic to the Procedure Committee and successfully boycotted a number of bills presented by the DPP and TSU," he said.
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