A.5.7.3.4 Standard Estimated Useful Life (EUL)

A. A key feature of CNA e-Tool is the Standard Estimated Useful Life Table of a typical site and building components. The term “Estimated Useful Life” (EUL) refers to a period of years in which a given component of standard quality under average conditions may be expected to remain serviceable for its intended purpose. Remaining Useful Life (RUL) is the result obtained by subtracting the actual age of a component from its EUL.

B. The Standard Estimated Useful Life Table is organized in accordance with the ASTM E2018-15 outline for needs assessments. Each site or building component is identified with the following three subcategories in broad to narrower order: Need Categories; Need Items; Component Types. Each Component Type is assigned a particular average standard EUL, depending on whether the property is designated as “family” or “elderly.” Every component present or to be installed at the property must be associated with a Component Type and given a specific name referred to as “Component ID” in the e-Tool.