Delay, Disruption and Acceleration Claims

Introduction
Delay, disruption and acceleration claims are among the most common, costly and contested issues in construction projects. For the PMI Construction Professional (PMI-CP) credential, you are expected to know how time-related and productivity-related impacts arise, how they are proven, and how they are resolved under the contract. This guide covers what these claims are, why they matter, how they work in practice, and how to approach exam questions on them.

Why Delay, Disruption and Acceleration Claims Are Important
1. Financial impact: Time-related costs such as extended site overheads, equipment standby, escalation and loss of productivity can be a large share of a project's final cost.
2. Contractual risk allocation: These claims decide who carries the risk of time and cost overruns: the owner, the contractor or neither party.
3. Liquidated damages exposure: A contractor that cannot prove excusable delay may face liquidated damages (LDs). An owner that causes delay may lose the right to apply LDs, or may face time being set 'at large' in some jurisdictions.
4. Relationship and project health: Unresolved time claims are a leading cause of formal disputes, arbitration and litigation. Good claims management protects relationships and keeps the project moving.
5. Professional responsibility: A construction project manager must spot impacts early, give timely notice, keep records and handle claims fairly and ethically.

What They Are: Key Definitions
Delay: An event or condition that causes the project, or part of it, to finish later than planned. Delay is about time, usually measured against the critical path or the contract completion date.
Disruption: Interference with the contractor's planned working methods that reduces productivity. It increases cost even if the completion date does not change. Examples include stacking of trades, out-of-sequence work, frequent changes, restricted access and lack of information. Disruption is about efficiency, not necessarily time.
Acceleration: Speeding up the work, such as adding resources, overtime, extra shifts or resequencing, so that work finishes earlier than it otherwise would, or to recover lost time.

Types of Delay
1. Excusable and compensable: Caused by the owner or the owner's agents, such as late design information, late site access, owner-directed changes or differing site conditions where the owner carries that risk. The contractor is entitled to an extension of time (EOT) and to additional cost.
2. Excusable and non-compensable: Caused by neutral events beyond either party's control, such as force majeure, exceptionally adverse weather or certain regulatory actions. The contractor gets time, which protects it from LDs, but usually no money.
3. Non-excusable: Caused by the contractor or its subcontractors and suppliers, such as poor planning, low productivity or late mobilization. The contractor gets no time and no money, and may be liable for LDs or must accelerate at its own cost.
4. Concurrent delay: Two or more delays, at least one owner-caused and one contractor-caused, that affect the critical path in the same period. The usual approach is time but no money, though the treatment depends on the contract and jurisdiction. Some contracts apportion the costs.
5. Critical vs. non-critical: Only delays on the critical path, or those that consume all float and become critical, extend the completion date.

Types of Acceleration
1. Directed (actual) acceleration: The owner formally instructs the contractor to finish early or to recover owner-caused delay. This is normally compensable as a change.
2. Constructive acceleration: The contractor is entitled to an EOT, but the owner refuses or fails to grant it and insists on the original completion date, often by threatening LDs. The contractor speeds up to avoid penalties and then claims the acceleration costs. Typical elements are:
- an excusable delay occurred,
- the contractor gave proper notice and requested an EOT,
- the owner refused or ignored the request,
- the owner's words or conduct required on-time completion,
- the contractor actually accelerated and incurred extra cost.
3. Voluntary acceleration: The contractor accelerates by its own choice, for example to recover its own delay or to earn a bonus. This is not compensable.

How It Works: The Claims Process
Step 1 – Identify the event: Recognize a potential delaying or disrupting event as early as possible, for example through risk registers, look-ahead schedules and RFI logs.
Step 2 – Review the contract: Check the clauses on EOT, notice, variations/changes, differing site conditions, force majeure, LDs, float ownership, concurrency and dispute resolution. The contract governs entitlement.
Step 3 – Give timely notice: Most contracts, such as FIDIC (28 days), NEC (8 weeks under early warning and compensation event rules) and AIA/ConsensusDocs, require written notice within a set time. Late notice can bar a claim through condition precedent clauses.
Step 4 – Keep contemporaneous records: Daily reports, labor and equipment logs, photos, meeting minutes, correspondence, schedule updates, RFIs and cost records. Records made at the time are the strongest evidence.
Step 5 – Perform schedule (delay) analysis: Show cause and effect on the critical path using a recognized method (see below).
Step 6 – Quantify the impact: Calculate the time entitlement and the associated costs.
Step 7 – Prepare and submit the claim: Include the narrative, contractual basis, causation analysis, quantum and supporting documents.
Step 8 – Evaluate, negotiate and resolve: The owner or engineer reviews the claim, and negotiation follows. If it is not settled, the dispute moves up the contract's resolution ladder: negotiation, mediation, dispute boards (DAB/DAAB), adjudication, arbitration and litigation.

Delay Analysis Methods
1. As-Planned vs. As-Built: Compares the baseline schedule with actual progress. It is simple but weak at showing causation.
2. Impacted As-Planned: Inserts delay events into the baseline schedule. It is quick, but it ignores actual progress and contractor delays, so it is often criticized.
3. Collapsed As-Built (But-For): Removes owner delays from the as-built schedule to show when the work would have finished 'but for' those delays.
4. Time Impact Analysis (TIA): Inserts a fragnet for each delay event into the schedule update current at the time of the event. It is widely preferred for prospective analysis and is recommended by the SCL Delay and Disruption Protocol.
5. Windows / Contemporaneous Period Analysis: Divides the project into time windows and analyzes critical path movement in each. It is strong for retrospective analysis.
Key guidance documents: the Society of Construction Law (SCL) Delay and Disruption Protocol and AACE International Recommended Practice 29R-03 (Forensic Schedule Analysis).

Float
Float is the amount of time an activity can slip without delaying completion. Who owns float matters:
- Project float: In many contracts and under the SCL Protocol, float is shared, so whoever uses it first benefits.
- A delay that consumes float without moving the completion date usually gives no EOT, though disruption costs may still be recoverable.

Quantifying Costs
Delay costs: Extended field and site overheads (time-related preliminaries), extended home office overhead (for example the Eichleay formula or Hudson/Emden formulas, where allowed), idle equipment, escalation, extended insurance and bonds, and financing costs.
Disruption (lost productivity) costs: Methods in rough order of preference:
1. Measured mile: Compares productivity in an unimpacted period with an impacted period of similar work. This is the most accepted method.
2. Earned value analysis.
3. Comparison with similar projects.
4. Industry studies, such as MCAA factors or NECA/BLS data on overtime and trade stacking.
5. Total cost method and modified total cost method: Used as a last resort. They are accepted only if the bid was reasonable, actual costs were reasonable, the contractor did not cause the overrun, and no other method is practical.
Acceleration costs: Overtime premiums, extra shift costs, additional labor and equipment, productivity loss from fatigue or congestion, and expediting fees.

Global Claims
A global (or 'total') claim lumps several events together without linking each cause to its effect. Tribunals view these with suspicion. The best practice is to establish cause and effect for each event wherever possible.

Preventing and Managing These Claims
- Develop a realistic, resource-loaded baseline schedule and update it regularly.
- Use early warning systems and risk management.
- Process RFIs and change orders promptly.
- Hold regular progress meetings with documented minutes.
- Follow the notice requirements strictly.
- Use collaborative approaches such as partnering, dispute boards and NEC-style early warnings.
- Deal with time impacts prospectively and as close to the event as possible, as the SCL Protocol recommends.

Exam Tips: Answering Questions on Delay, Disruption and Acceleration Claims
1. Classify first: Decide whether the scenario involves delay (time), disruption (productivity) or acceleration (speeding up). Many questions hinge on this distinction.
2. Identify the cause and who carries the risk: Owner-caused delays give time and money. Neutral events give time only. Contractor-caused delays give nothing. Concurrent delays usually give time only, unless the contract says otherwise.
3. Check the critical path: If the delayed activity has float and the completion date does not move, there is usually no EOT. Watch for answers that grant an EOT for non-critical delays.
4. Notice is king: When an event occurs, the first correct action is almost always to give written notice under the contract and start documenting. Choose 'review the contract and issue timely notice' over 'stop work' or 'file for arbitration'.
5. Spot constructive acceleration: The classic pattern is an excusable delay, an EOT request that is denied or ignored, and an owner demand to finish on time. The contractor accelerates and may recover its costs.
6. Prefer contemporaneous, prospective methods: When asked for the best delay analysis method, TIA and windows analysis usually beat impacted as-planned or as-planned vs. as-built.
7. Prefer the measured mile for disruption: The total cost method is a last resort.
8. Escalate disputes in stages: Choose negotiation before mediation, mediation before dispute boards or adjudication, and those before arbitration or litigation, unless the contract requires otherwise.
9. Watch for absolute words: Options with 'always' or 'never' are often wrong because outcomes depend on the contract terms.
10. Think like a professional PM: PMI favors proactive, collaborative, well-documented and ethical actions. Avoid answers that hide information, ignore the contract or escalate too early.
11. Know the key references: the SCL Delay and Disruption Protocol, AACE 29R-03, the Eichleay formula, and FIDIC, NEC and AIA notice concepts.
12. Read calculation questions carefully: For EOT, count only critical-path impact net of available float. For LDs, multiply the daily rate by the non-excusable delay days only.

Sample Question Walkthrough
Scenario: The owner issued design drawings three weeks late for a critical activity. The contractor requested an EOT, which was rejected, and the owner insisted on the original completion date. The contractor added a second shift and finished on time. What can the contractor most likely claim?
Analysis: The delay is owner-caused and on the critical path, so it is excusable and compensable. The EOT request was refused and on-time completion was demanded, which is the pattern for constructive acceleration. The answer is that the contractor can claim its acceleration costs, such as second shift premiums and the related productivity loss, as constructive acceleration.

Summary
Delay claims concern time, disruption claims concern productivity, and acceleration claims concern the cost of speeding up. Entitlement depends on the contract, the cause, the critical path impact, proper notice and solid records. Master the delay categories, the analysis methods, the quantification techniques and the dispute resolution sequence, and you will be well prepared for this part of the PMI-CP exam.