A number of cost thresholds exist which trigger increasing degrees of complexity in the acquisition process. These thresholds include the micro-purchase threshold, the simplified acquisition threshold, and the commercial items threshold. The micro-purchase threshold, as of August 2007, is generally $3,000, with some exception. No competition or publication requirements are mandated for micro-purchases; generally, the Government Commercial Purchase Card (GCPC) can be used for these purchases under FAR Part 13. From $3,000 to $100,000, agencies may make use of Simplified Acquisition Procedures under FAR Part 13. Blanket purchase agreements, basic ordering agreements, or other contracts may be awarded under simplified procedures, which allow supplies or services to be ordered at a predetermined fair and reasonable price. The simplified acquisition threshold can be increased in situations specified in FAR Part 13, including overseas contingency operations (for example, military operations) and during nuclear/biological/radiological disasters up to the limits described in FAR Part 2, Definitions. FAR Part 13 simplified acquisition procedures can be used up to $5,000,000 ($11M under specified exceptions) under a test program in which Congress continues to reauthorize for acquisition of commercial items under FAR Subpart 13.5, Test Program for Certain Commercial Items. Items must qualify as a commercial item under the definition of FAR Part 2 and be supported by market research as specified in FAR Part 10. Type of acquisition (FAR Part 16, Types of Contracts): There are two main types of contracts – fixed price and cost reimbursement. In deciding which type to use, a Contracting Officer's identification of risk is key. A very well known requirement, such as for commercial off-the-shelf (COTS) items (in which no R&D would be needed and there are no high risk aspects) would be best acquired using a fixed-price contract, in which a price is fixed and includes the contractor's profit; all risk of cost overrun is transferred to the contractor. A higher risk, more unknown requirement is more suited for cost reimbursement type contracts, in which the contractor is reimbursed for all costs, and is paid a fee above that amount. In this arrangement, cost overrun risk is placed mainly upon the Government. Buying patterns: If an agency has a continuing need for a requirement over a period of time, a vehicle that permits multiple orders may be advantageous. For example, a blanket purchasing agreement (BPA) or a basic ordering agreement (BOA) as described in FAR Part 13 may be