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Construction project documents showing or-equal substitution analysis against CSI MasterFormat product requirements
Industry Guides
Why 'Or-Equal' Substitutions Cost Construction Billions
'Or-equal' substitutions cost the US construction industry an estimated $3-15B annually in submittal rework alone — before counting downstream change orders and lifecycle operating costs. The CSI MasterFormat workflow that prevents the failures.
May 8, 2026
14 min read

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