Risk-Based Inspection

6.3.1 Qualitative Approach 定 性 的 方 法
This approach requires data inputs based on descriptive information using
engineering judgment and experience as the basis for the analysis of probability
and COF. 使 用 基 于 (1) 工 程 判 断 和 (2) 经 验 的 描 述 性 信 息 作 为 后 果 COF 与 概 率 分
析 POF. 定 性 分 析 结 果 的 准 确 性 取 决 于 风 险 分 析 师 和 团 队 成 员 的 背 景 和 专 业 知 识 .
Inputs are often given in data ranges instead of discrete values. Results are
typically given in qualitative terms such as high, medium, and low, although
numerical values may also be associated with these categories. The value of
this type of analysis is that it enables completion of a risk assessment in the
absence of detailed quantitative data. The accuracy of results from a qualitative
analysis is dependent on the background and expertise of the risk analysts and
team members. Although the qualitative approach is less precise than more
quantitative approaches it is effective in screening out units and equipment with
low risk. The qualitative approach may be used for any aspect of inspection
plan development; however, the conservatism generally inherent in the more
qualitative approach should be considered when making final mitigation and
inspection plan decisions.
API 580
Charlie Chong/ Fion Zhang