Isolated collapsed but-for delay analysis methodology

Jyh Bin Yang, Pi Chung Yin

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Schedule delays are common in construction projects. Although many methods have been developed for analyzing and measuring schedule delays for construction projects, each method has functional limitations and use prerequisites. No one method is acceptable for all project participants under all circumstances. This study presents the isolated collapsed but-for (ICBF) method, an innovative delay analysis method for construction projects. During analysis, the ICBF method requires as-planned and as-built schedules as well as identified liability documents with key delay events to perform its analysis approach. Based on its application to an illustrative case and comparisons with other methods, the ICBF method is effective for delay analysis. Results provided by the proposed method can be easily traced to the actual case in an as-built schedule.

Original languageEnglish
Pages (from-to)570-578
Number of pages9
JournalJournal of Construction Engineering and Management
Issue number7
StatePublished - 2009


  • Analytical techniques
  • Claims
  • Construction management
  • Delay time
  • Dispute resolution
  • Liability
  • Scheduling


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