However, officials from the Planning Commission rubbish such concerns, saying that the move to pre-qualify candidates is an international best practice. “The move to limit number of bidders to just five-six is to ensure that only serious players take part. Preparing a financial bid is an expensive process and many companies may not be willing to undertake this activity unless there is a good probability for them to get contracts,” said Gajendra Haldea, advisor to the Planning Commission Deputy Chairman.