For turnarounds, work scope is the most critical item related to performance outcomes. Despite this fact, there has long been a critical hole in our industry’s collective toolset: How do we effectively benchmark and evaluate turnaround scope? Industry has not had an objective, quantifiable measure of scope that can help answer this question—until now. The Turnaround Scope Index (TSI) provides a quantitative means to validate scope selection, thereby removing the subjectivity that has historically plagued scope challenge methodologies. The TSI empirically quantifies the amount of turnaround scope, and enables the benchmarking of scope relative to comparable Industry events. It allows Industry to look at scope objectively, and to compare scope against Industry norms.