Quantitative risk assessment is the mathematical calculation of probable program outcomes (cost, schedules, technical performance, or a combination of these) arrived at by integrating detailed information provided by numerous experts who examine program elements in order to synthesize a model. Seven techniques predominant in this type of analysis are explained: network analysis, the method of moments (concerned with cost risk and using cost breakdowns), decision analysis, WBS (or cost breakdown), simulation methods, the graphic method, the estimating relationship method, and the risk factor method. The applicability of these methods are described in terms of inputs and outputs, the soundness of the theory, conditions affecting their use, and benefits and disadvantages. Appendixes provide detailed discussion of the techniques in use, the service regulations pertaining to risk assessments, a glossary of terms, and a structured bibliography.