Estimating system audits are not automatic actions undertaken by DCAA, and require a Contracting Officer’s request for audit. FAR 15.407 requires audit surveillance of a contractor’s estimating system and DFARS 215.407-5-70 requires all DoD contractors to have an adequate estimating system. However, factors such as contract type, contract value, the required submission of certified cost or pricing data and contract type contribute to a contracting officer’s decision in requesting a review of a contractor’s estimating system. Lastly, large DoD contractors meeting the applicability requirements of DFARS 252.215-7002 should generally expect an audit by DCAA within a year of applicability, and then once every three years thereafter.