Recommended Practice 116R-21, Basis of Estimate – As Applied in Maintenance Turnarounds for the Process Industries has been posted for public review and comment until June 13, 2021.

This recommended practice (RP) is a guideline for the development of Basis of Estimate (BoE) documents for maintenance turnaround cost estimates in the process industries. It provides information specific to maintenance turnarounds and to the process industries that is not available in the general RP 34R-05 “Basis of Estimate”.

Maintenance turnaround events (which are sometimes viewed as a short-interval project by contractors or owner’s internal maintenance crews) typically also have traditional capital project tie-in scope which needs to be executed in the turnaround event window, as well as the standard maintenance and inspection (M&I) scopes. The cost estimates covered by this RP are for the M&I work scope only. For a discussion of BoE documents for capital projects, refer to RP 106R-19 “Development of Cost Estimate Basis – As Applied in Engineering, Procurement, and Construction for the Process Industries”.

This document discusses maintenance turnarounds for continuously operating units in the process industries.

You can find the draft RP here:

(PUBLIC REVIEW DRAFT) 116R-21: Basis of Estimate – As Applied in Maintenance Turnarounds for the Process Industries

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