A “delay” on a construction project is defined as the stretching out of the time for completion of certain key milestone scopes of work which can impact the completion date of an entire project, due to some circumstances or events that were not reasonably anticipated when the project began. 2 Construction Law ¶ 6.01 (Matthew Bender, 2024). While delays can be caused by any number of events, the most common are defective plans and specifications; design changes; severe weather and other, similar unforeseeable events; unforeseen or differing site conditions; unavailability of materials or labor; labor inefficiencies or stoppages; contractor negligence; and owner influences, including construction changes or outright interference by the owner or its agents. If the project schedule is not recovered following a delay, then the project schedule will likely be extended, resulting in an increase in the contractor’s costs of performance. A contractor that has experienced a delay on a project can take certain actions to pursue recovery of any damages the contractor may have incurred. However, to do so it is important to understand the different types of delays and the methods for establishing the delays.

I. Types of Delays
Delays may be categorized as (1) critical versus non-critical delays, (2) excusable versus non-excusable delays, and (3) compensable versus non-compensable delays. A critical delay is a delay that affects the project completion date and delays the entire project. In essence, a critical delay is one that will extend the critical path of a project. A non-critical delay is a delay that has no effect on the project’s critical path. Courts have recognized that delays to work not on the critical path will generally not delay the completion of a project. G.M. Shupe, Inc. v U.S., 5 Cl. Ct. 662, 728 (1984). Such a non-critical delay may affect the completion of certain activities, but does not affect the completion date of the entire project. In order for a delay to provide the basis for a claim for additional time or money, the delay must impact critical path activities on the project schedule.