In order for a claimant to be entitled to an extension of contract time for a delay event (and further to be considered compensable):

For a delay to warrant an extension of the contract completion date, it must delay the project's overall completion. In Critical Path Method (CPM) scheduling, the project completion date is determined by the longest path of activities, known as the critical path. Therefore, a delay event must impact an activity on the critical path (or consume float such that a new critical path is formed) to justify a time extension. A delay to a non-critical activity that does not exhaust its float will not delay project completion.

B. The delay must be concurrent with the delay attributable to both parties: Concurrency is a specific delay scenario, not a general prerequisite for entitlement to a time extension.
C. The delay must not cause monetary harm to the defendant: A compensable delay explicitly involves the defendant (owner) providing monetary compensation for harm suffered by the claimant (contractor).
D. The delay must affect the contractor's planned construction schedule: This is too vague; a delay can affect a non-critical part of the schedule without impacting the final completion date.

1. AACE International Recommended Practice No. 29R-03

"Forensic Schedule Analysis

" (April 25

2011). Section 4.1.A states

"The basic premise of all CPM-based schedule analysis methods is that a party is entitled to a time extension only to the extent that a delay to a critical path activity is caused by the other party."

2. AACE International

Skills and Knowledge of Cost Engineering

6th Ed.

Morgantown

WV: AACE International

2015. Chapter 25 (Project Scheduling) explains that only delays to critical path activities will delay the project completion date.

3. Stephenson

H. L. (Ed.). (2019). AACE International's Planning & Scheduling Professional (PSP) Certification Study Guide

3rd Ed. AACE International. The guide repeatedly emphasizes that impact to the critical path is the basis for granting a time extension in a delay claim.