He emphasised the need for keeping headline inflation close to 4 per cent on a durable basis.
"We have to be vigilant on account of uncertainties on the external and fiscal fronts; this calls for a cautious approach," he said.
The RBI Governor-headed six-member MPC had met on October 3 and 4 to decide this fiscal's third bi-monthly monetary policy.
Based on the majority view at the MPC meet, the central bank decided to maintain status quo and left key policy rate (repo) unchanged at 6 per cent despite a clamour for moderation to boost the economy which hit 3 year low of 5.7 per cent in the first quarter of the current fiscal.
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"In my view, the policy rate should have been cut by 50 basis point long back in June 2017. A cut of 25 basis point in August was too small and too late. We can still make the additional cut of 25 basis point now if we want to be extremely cautious.
MPC had expressed concern that implementation of farm loan waivers by states may result in possible fiscal slippages and undermine the quality of public spending, thereby exerting pressure on prices.
Acharya said at the meeting that RBI remains committed to improving the transmission of monetary policy.
"I believe there is still some scope left for transmission of past monetary policy accommodation to existing loan portfolio that is tied to the base rate," said Acharya, who is incharge of monetary policy department.
"To improve immediate growth prospects, teething troubles relating to GST (Goods and Services Tax) need to be addressed expeditiously. Concerted efforts also need to be made to encourage investment activity by removing various constraints," he said.
The minutes said MPC's decision was consistent with a neutral stance of the monetary policy in consonance with the objective of achieving the medium-term target for retail inflation of 4 per cent within a band of +/- 2 per cent, while supporting growth.