Project Manager Assessment: Subjective EV Measurement

<div class="ge-article-wrapper"><nav class="ge-toc" aria-label="Table of contents"><p class="ge-toc-label">In this article</p><ul class="ge-toc-list"><li><a href="#the-definition">The Definition</a></li><li><a href="#the-four-triggers">The Four Triggers</a></li><li><a href="#why-this-matters-for-evm">Why This Matters for EVM</a></li><li><a href="#worked-example-pm-assesses-at-340k-contractor-wanted-520k">Worked Example: PM Assesses at £340K, Contractor Wanted £520K</a></li><li><a href="#the-dispute-route">The Dispute Route</a></li><li><a href="#common-mistakes">Common Mistakes</a></li><li><a href="#frequently-asked-questions">Frequently Asked Questions</a></li></ul></nav><article class="ge-article-body"><p>A Project Manager assessment is NEC4's backstop mechanism. When a Contractor fails to submit a quotation for a compensation event, or submits one that doesn't comply, the Project Manager steps in and assesses the time and cost impact themselves. It's clause 64.1, and it's one of the most consequential provisions in the entire contract. Because the PM's assessment becomes the implemented figure, whether the Contractor agrees with it or not. </p><p>PM assessment is part of the <a href="/en/earned-value/definitions">earned value definitions glossary</a>. For the NEC4 compensation events overview, see the <a href="/en/nec4/compensation-events">compensation events spoke</a>. For the full EVM formula reference, see the <a href="/en/earned-value/formulas">earned value formulas page</a>. </p><h2 id="the-definition">The Definition</h2><p><strong>Project Manager assessment = the PM's own evaluation of the cost and time effect of a compensation event, made when the Contractor's quotation process has failed</strong></p><p>This isn't the default route. The normal process is: CE notified, PM instructs quotation, Contractor submits quotation, PM accepts or negotiates. The PM assessment route only kicks in when that process breaks down. </p><p>And it almost always favours the PM's view of the numbers. Not because PMs are biased (though some are), but because the PM assesses based on the information available to them. If the Contractor hasn't provided a detailed quotation with supporting records, the PM has less to work with. </p><h2 id="the-four-triggers">The Four Triggers</h2><p>Clause 64.1 sets out exactly four situations where the PM makes their own assessment. Not five. Not "whenever they feel like it." </p><pre class="ge-ascii-diagram ge-anim"> CLAUSE 64.1: PM ASSESSMENT TRIGGERS ==================================== Normal CE Route PM Assessment Route ──────────── ──────────────────── CE notified CE notified │ │ ▼ ▼ PM instructs quotation PM instructs quotation │ │ ▼ ▼ Contractor submits ┌─── Contractor FAILS ───┐ quotation within │ to submit within │ 3 weeks │ 3 weeks │ │ │ OR │ ▼ │ │ PM accepts, │ PM has notified the │ negotiates, │ Contractor that their │ or rejects │ quotation is not │ │ │ assessed on a correct │ ▼ │ basis AND the │ CE implemented │ Contractor hasn't │ at agreed figure │ resubmitted properly │ │ OR │ │ │ │ PM decides the │ │ Contractor hasn't │ │ assessed the CE │ │ correctly in a │ │ revised quotation │ │ OR │ │ │ │ CE arises from a │ │ PM assumption about │ │ a future CE, and the │ │ assumption was wrong │ │ │ └────────┬────────────────┘ │ ▼ PM makes own assessment │ ▼ PM notifies Contractor of assessment │ ▼ CE implemented at PM's assessed figure </pre><p>The most common trigger by far is the first one: the Contractor misses the 3-week deadline for submitting their quotation. I've seen this happen on roughly one in five CEs. The commercial team is stretched, the QS is firefighting on three packages simultaneously, and the 3-week clock runs out. The PM assesses, typically at a lower figure, and the Contractor has lost their chance to present their own case. </p><h2 id="why-this-matters-for-evm">Why This Matters for EVM</h2><p>When a PM assessment is implemented, it changes the <a href="/en/earned-value/definitions/budget-at-completion">BAC</a>. The target total of the Prices adjusts by the assessed amount. If the PM assesses a CE at £340,000 but the Contractor's actual cost turns out to be £450,000, the Contractor absorbs the £110,000 difference on an Option C contract through the pain/gain mechanism. </p><p>From an EVM perspective, this creates a genuine problem. Your BAC has moved by £340K. But your <a href="/en/earned-value/definitions/actual-cost">AC</a> reflects the actual spend of £450K. So the <a href="/en/earned-value/definitions/cost-performance-index">CPI</a> for that portion of work is immediately below 1.0. Not because the team is inefficient, but because the PM's assessment was lower than reality. </p><p>I've seen this distort EVM data on whole programmes. Twelve PM assessments across a £60M scheme, each one slightly lower than the Contractor's actual cost, collectively creating a phantom cost overrun of £800K in the EVM system. The project wasn't over budget. The baseline was wrong. </p><h2 id="worked-example-pm-assesses-at-340k-contractor-wanted-520k">Worked Example: PM Assesses at £340K, Contractor Wanted £520K</h2><span class="ge-worked-label">Worked Example</span><div class="ge-callout ge-anim"><p><strong>Scenario:</strong> On a £25M NEC4 Option C water treatment upgrade in Yorkshire, a compensation event is notified on 6 January 2025 for unexpected contaminated ground requiring specialist removal. The PM instructs a quotation on 10 January.</p><br><p><strong>The 3-week clock:</strong> The Contractor must submit a quotation by 31 January 2025.</p><br><p><strong>What actually happens:</strong> The Contractor's QS is dealing with three other CE quotations and a subcontractor dispute. They don't submit by 31 January. On 3 February, the PM notifies the Contractor that they will make their own assessment under clause 64.1.</p><br><p><strong>The Contractor's late estimate (informal):</strong> £520,000</p><p>- Specialist removal contractor: £285,000</p><p>- Additional supervision (12 weeks): £96,000</p><p>- Design changes to foundation: £78,000</p><p>- Programme impact (4 weeks delay): £61,000</p><br><p><strong>The PM's assessment:</strong> £340,000</p><p>- Specialist removal contractor: £245,000 (PM uses a different rate basis)</p><p>- Additional supervision (8 weeks): £64,000 (PM disagrees on duration)</p><p>- Design changes to foundation: £31,000 (PM strips contingency)</p><p>- Programme impact: £0 (PM says Contractor has float in programme)</p><br><p><strong>The gap:</strong> £180,000.</p><br><p><strong>EVM impact:</strong></p><p>- BAC adjusts by +£340,000 (the implemented PM assessment)</p><p>- AC for this work will be closer to £480,000 (actual spend, falling between the two estimates)</p><p>- CPI for this CE scope = £340,000 / £480,000 = <strong>0.708</strong></p><p>- This drags down the project-level CPI</p><br><p><strong>What should have happened:</strong> The Contractor should have submitted their quotation within 3 weeks, with full supporting documentation, giving them the chance to justify the £520K figure and negotiate.</p></div><h2 id="the-dispute-route">The Dispute Route</h2><p>A PM assessment isn't the final word if the Contractor disagrees. The Contractor can refer the matter to adjudication under clause W1 or W2. But that takes time and costs money. </p><p>In practice, most PM assessments stick. The Contractor either accepts the figure or the cost of disputing it outweighs the difference. That's why missing the quotation deadline is so commercially damaging. You're handing control of your entitlement to the other side. </p><h2 id="common-mistakes">Common Mistakes</h2><p><strong>Missing the 3-week quotation deadline.</strong> This is the mistake that creates PM assessments. Set up a CE tracker. Flag deadlines at 2 weeks and at 2.5 weeks. Make the 3-week deadline the most sacred date in your commercial calendar. It is genuinely baffling how many commercial teams don't have a simple diary system for this. </p><p><strong>Not providing records to support the quotation.</strong> Even when Contractors do submit on time, they often submit a one-page figure without supporting detail. The PM rejects it as "not assessed on a correct basis." Now the clock resets, and if the revised quotation still doesn't cut it, the PM assesses. Build your quotation like you're building a claim: detailed breakdown, rates, durations, programme analysis, and records. </p><p><strong>Assuming the PM's assessment can be appealed informally.</strong> Once implemented, a PM assessment can only be changed through the formal dispute resolution process (adjudication) or by mutual agreement. Sending an email saying "we disagree" doesn't change anything contractually. You need to decide quickly: accept or adjudicate. </p><p><strong>Not adjusting EVM baselines for PM assessments.</strong> When a PM assessment is implemented, your <a href="/en/earned-value/definitions/budget-at-completion">BAC</a> must change. But the team also needs to recognise that the baseline may now be lower than the actual cost of delivering the work. Track PM-assessed CEs separately in your EVM commentary so the CPI distortion is visible and explained. </p><div class="ge-product-note ge-anim"><p><strong>How Gather helps.</strong> Gather's AI reads your site diaries daily and maps progress against your cost-loaded programme, giving you accurate earned value data without manual spreadsheet updates. <a href="https://gatherinsights.com/contact">Book a demo</a> to see it working on a live NEC4 project.</p></div><h2 id="frequently-asked-questions">Frequently Asked Questions</h2><h3>Can the PM assess a CE without telling the Contractor first?</h3><p>No. Under clause 64.1, the PM must notify the Contractor before making their own assessment. The Contractor should get the opportunity to submit or resubmit their quotation first. A PM who assesses without notice is breaching the contract procedure. </p><h3>How long does the PM have to make their assessment?</h3><p>The contract doesn't specify a separate time limit for PM assessments. However, the same principles of acting in a spirit of mutual trust and cooperation (clause 10.2) apply. In practice, PMs typically assess within 2 to 4 weeks of notifying the Contractor. Unreasonable delay can be grounds for a dispute. </p><h3>Is a PM assessment always lower than the Contractor's quotation?</h3><p>Not always, but usually. The PM assesses based on the information available, and without the Contractor's detailed quotation, they often have less visibility of the full cost impact. I've seen PM assessments come in higher than the Contractor's figure twice in 15 years. Both times it was because the Contractor had underestimated the programme impact. </p><h3>Does a PM assessment affect the Accepted Programme?</h3><p>Yes. If the PM's assessment includes a change to the Completion Date, the <a href="/en/earned-value/definitions/accepted-programme">Accepted Programme</a> should be updated to reflect this. If the PM assesses zero programme impact (as in our worked example), the Accepted Programme doesn't change for that CE, even if the work actually does take longer than planned. </p></article></div>