What Is a Cost Performance Report (CPR) in EVM?

<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-five-format-structure">The Five Format Structure</a></li><li><a href="#worked-example-monthly-cpr-on-a-65m-government-infrastructure-project">Worked Example: Monthly CPR on a £65M Government Infrastructure Project</a></li><li><a href="#cpr-vs-ipmr-vs-ipmdar">CPR vs IPMR vs IPMDAR</a></li><li><a href="#why-cpr-structure-matters-in-construction">Why CPR Structure Matters in Construction</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 Cost Performance Report (CPR) is the formal document that tells the client exactly where their money is going on a project, and whether they should be worried. It's the structured reporting mechanism under <a href="/en/earned-value/definitions/earned-value-management">earned value management</a> (EVM) that combines cost data, schedule performance, staffing levels, and narrative explanations into one standardised submission. If you've worked on government infrastructure or defence contracts, you'll have seen these. If you haven't, you've probably been producing something similar under a different name.</p><p>The CPR originated in US Department of Defense procurement and became the standard EVM reporting format under ANSI/EIA-748. In 2012, it was formally superseded by the <a href="/en/earned-value/definitions/integrated-program-management-report">Integrated Program Management Report</a> (IPMR), and more recently by the Integrated Program Management Data and Analysis Report (IPMDAR). But the five-format structure lives on, and understanding it matters because most <a href="/en/earned-value/report-template">earned value reporting</a> in UK construction borrows heavily from this framework, even if nobody calls it a CPR.</p><p>This page is part of the <a href="/en/earned-value/definitions">earned value definitions glossary</a>. For related metrics, see the <a href="/en/earned-value/definitions">EVM formulas page</a>.</p><h2 id="the-five-format-structure">The Five Format Structure</h2><p>The CPR isn't a single report. It's five coordinated formats, each showing a different slice of the same data. Think of it as five lenses on one project.</p><pre class="ge-ascii-diagram ge-anim"> ┌─────────────────────────────────────────────────┐ │ COST PERFORMANCE REPORT │ │ │ │ ┌──────────────┐ ┌──────────────┐ │ │ │ FORMAT 1 │ │ FORMAT 2 │ │ │ │ <a href="/en/earned-value/definitions/work-breakdown-structure">WBS</a> │ │ OBS │ │ │ │ │ │ │ │ │ │ Cost by │ │ Cost by │ │ │ │ work │ │ organisation│ │ │ │ package │ │ / dept │ │ │ └──────┬───────┘ └──────┬───────┘ │ │ │ │ │ │ └──────┬────────────┘ │ │ ▼ │ │ ┌──────────────────────────┐ │ │ │ FORMAT 3 │ │ │ │ Baseline Changes │ │ │ │ │ │ │ │ Original budget │ │ │ │ + Approved changes │ │ │ │ = Current BAC │ │ │ └──────────┬───────────────┘ │ │ ▼ │ │ ┌──────────────┐ ┌──────────────┐ │ │ │ FORMAT 4 │ │ FORMAT 5 │ │ │ │ Staffing │ │ Narratives │ │ │ │ │ │ │ │ │ │ Hours by │ │ Explain the │ │ │ │ category │ │ numbers │ │ │ │ and month │ │ (the "why") │ │ │ └──────────────┘ └──────────────┘ │ │ │ └─────────────────────────────────────────────────┘ </pre><h3>Format 1: Work Breakdown Structure (WBS)</h3><p>This is the workhorse. Format 1 shows <a href="/en/earned-value/definitions/planned-value">Budgeted Cost of Work Scheduled (PV)</a>, <a href="/en/earned-value/definitions/earned-value">Budgeted Cost of Work Performed (EV)</a>, and <a href="/en/earned-value/definitions/actual-cost">Actual Cost of Work Performed (AC)</a> for every element of the WBS. It's where <a href="/en/earned-value/definitions/cost-variance">cost variance</a> and schedule variance live.</p><p>On a highway project, you'd see WBS elements like earthworks, drainage, structures, surfacing, each with its own line of BCWS, BCWP, ACWP, CV, and SV. The summary row gives the project-level picture.</p><h3>Format 2: Organisational Breakdown Structure (OBS)</h3><p>Same data as Format 1, but sliced by who's doing the work rather than what work is being done. This is where you see which department or subcontractor is overspending. I've found Format 2 invaluable on projects with multiple subcontract packages. It tells you instantly which package is bleeding money.</p><h3>Format 3: Baseline Changes</h3><p>Format 3 tracks every change to the <a href="/en/earned-value/definitions/budget-at-completion">Budget at Completion (BAC)</a>. Original budget, authorised changes, transfers between WBS elements, and management reserve usage. On NEC4 contracts, every implemented compensation event should appear here as a baseline change.</p><h3>Format 4: Staffing</h3><p>Monthly staffing data, actual and forecast hours by labour category. This format has always felt like the awkward cousin. Useful for resource-loaded programmes, but in UK construction, most teams track staffing separately through allocation sheets.</p><h3>Format 5: Explanations and Problem Analysis</h3><p>This is where the numbers become a story. Format 5 requires narrative explanations for any significant variance, why it happened, what impact it has, and what corrective action is planned. It's the format that senior stakeholders actually read.</p><p>I've seen Format 5 done brilliantly and done terribly. Done brilliantly, it connects a negative <a href="/en/earned-value/definitions/cost-performance-index">CPI</a> to a specific root cause with a costed recovery plan. Done terribly, it's three paragraphs of waffle about "ongoing challenges" that could apply to any project on earth.</p><h2 id="worked-example-monthly-cpr-on-a-65m-government-infrastructure-project">Worked Example: Monthly CPR on a £65M Government Infrastructure Project</h2><span class="ge-worked-label">Worked Example</span><div class="ge-callout ge-anim"><p><strong>Scenario:</strong> A £65M NEC4 Option C government infrastructure scheme, a new highway interchange in the East Midlands. The project team submits monthly CPRs to the Department for Transport as a contract requirement. At month 10 of a 24-month programme, the commercial manager prepares the September 2025 CPR.</p><p><strong>Format 1 extract (WBS):</strong></p><div class="ge-table-wrap ge-anim"><table class="ge-table"><thead><tr><th>WBS Element</th><th>BAC</th><th>PV (BCWS)</th><th>EV (BCWP)</th><th>AC (ACWP)</th><th>CV</th><th>SV</th></tr></thead><tbody><tr><td>1.1 Earthworks</td><td>£8.2M</td><td>£7.4M</td><td>£7.1M</td><td>£7.8M</td><td>-£0.7M</td><td>-£0.3M</td></tr><tr><td>1.2 Structures</td><td>£18.5M</td><td>£9.2M</td><td>£8.6M</td><td>£9.4M</td><td>-£0.8M</td><td>-£0.6M</td></tr><tr><td>1.3 Drainage</td><td>£6.1M</td><td>£4.9M</td><td>£5.1M</td><td>£4.7M</td><td>+£0.4M</td><td>+£0.2M</td></tr><tr><td>1.4 Surfacing</td><td>£12.8M</td><td>£3.2M</td><td>£2.8M</td><td>£3.0M</td><td>-£0.2M</td><td>-£0.4M</td></tr><tr><td>1.5 M&amp;E / ITS</td><td>£9.4M</td><td>£2.1M</td><td>£1.9M</td><td>£2.2M</td><td>-£0.3M</td><td>-£0.2M</td></tr><tr><td>1.6 Prelims</td><td>£10.0M</td><td>£4.2M</td><td>£4.2M</td><td>£4.5M</td><td>-£0.3M</td><td>£0.0M</td></tr><tr><td><strong>Total</strong></td><td><strong>£65.0M</strong></td><td><strong>£31.0M</strong></td><td><strong>£29.7M</strong></td><td><strong>£31.6M</strong></td><td><strong>-£1.9M</strong></td><td><strong>-£1.3M</strong></td></tr></tbody></table></div><p><strong>Project-level metrics:</strong></p><ul><li><a href="/en/earned-value/definitions/cost-performance-index">CPI</a> = £29.7M / £31.6M = <strong>0.940</strong></li><li><a href="/en/earned-value/definitions/schedule-performance-index">SPI</a> = £29.7M / £31.0M = <strong>0.958</strong></li><li><a href="/en/earned-value/definitions/estimate-at-completion">EAC</a> = £65.0M / 0.940 = <strong>£69.1M</strong> (forecast £4.1M overrun)</li></ul><p><strong>Format 5 narrative (extract):</strong> "The structures package (WBS 1.2) shows a CV of -£0.8M, driven primarily by unforeseen ground conditions at pier location 3. This was notified as a compensation event under clause 60.1(12) on 18 July 2025. The CE quotation of £1.1M has been submitted but not yet implemented. Once implemented, BAC will increase to £66.1M and CPI will improve to approximately 0.96. The corrective action for earthworks (WBS 1.1) involves revised sequencing of the remaining cut-to-fill operation, expected to recover £200K of the current overrun by month 14."</p></div><h2 id="cpr-vs-ipmr-vs-ipmdar">CPR vs IPMR vs IPMDAR</h2><p>The terminology can be confusing. Here's the evolution.</p><div class="ge-table-wrap ge-anim"><table class="ge-table"><thead><tr><th>Report</th><th>Standard</th><th>Active Period</th><th>Key Change</th></tr></thead><tbody><tr><td><strong>C/SCSC</strong></td><td>DoD 7000.2</td><td>1967-1996</td><td>Original EVM reporting</td></tr><tr><td><strong>CPR</strong></td><td>DI-MGMT-81466A</td><td>1996-2012</td><td>Five-format structure formalised</td></tr><tr><td><strong>IPMR</strong></td><td>DI-MGMT-81861</td><td>2012-2023</td><td>CPR + IMS in one submission</td></tr><tr><td><strong>IPMDAR</strong></td><td>DI-MGMT-81861A</td><td>2023-present</td><td>Data-centric, machine-readable</td></tr></tbody></table></div><p>In UK construction, nobody uses these labels precisely. What you'll see is monthly commercial reports that borrow the five-format structure, a WBS-level cost report, an organisational breakdown, a baseline log, a resource forecast, and a narrative. Call it a CPR or call it a monthly commercial report. The structure is the same.</p><h2 id="why-cpr-structure-matters-in-construction">Why CPR Structure Matters in Construction</h2><p>You don't need to be on a defence contract to benefit from this framework. The five-format structure solves a problem I see on almost every project: the commercial report tells you the numbers, but it doesn't tell you why.</p><p>Most UK construction projects produce a monthly <a href="/en/earned-value/definitions/cost-value-reconciliation">CVR (cost value reconciliation)</a> that covers Formats 1 and 3. Some add a resource forecast (Format 4). Almost none include a proper Format 5, structured variance analysis with root causes and corrective actions.</p><p>That's the gap. Adding Format 5 discipline to your existing reporting transforms it from a backward-looking record into a forward-looking management tool. It costs nothing except intellectual honesty.</p><h2 id="common-mistakes">Common Mistakes</h2><ol><li><strong>Treating the CPR as a compliance exercise.</strong> If you're filling it in to tick a box, the data will be wrong and nobody will read it. The CPR is only useful if the numbers are honest and the narratives are specific. "Cost pressures continue" is not a Format 5 explanation.</li><li><strong>Not updating the baseline.</strong> Format 3 should show every approved change. On NEC4 contracts, that means every implemented compensation event. I've seen projects where BAC hasn't been updated for six months despite 15 implemented CEs. The result? Every variance metric is wrong because the baseline is fiction.</li><li><strong>Ignoring Format 2.</strong> Everyone focuses on the WBS view (Format 1) and ignores the OBS view (Format 2). But when the project's CPI drops to 0.88, the first question the client asks is "who's overspending?" Format 2 answers that instantly.</li><li><strong>Inconsistent reporting periods.</strong> If the CPR cut-off is the 25th but some cost data runs to the 30th and some progress data is from the 20th, you're mixing apples with oranges. Every input to every format must share the same cut-off date.</li></ol><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>Is the CPR still used in 2025?</h3><p>The original CPR format (DI-MGMT-81466A) was formally replaced by the IPMR in 2012 and subsequently by the IPMDAR. However, the five-format structure remains the foundation of earned value reporting globally. In UK construction, you won't see a document labelled "CPR" very often, but the structure, WBS costs, OBS costs, baseline tracking, staffing, and narratives, supports most monthly commercial reports on EVM-compliant projects.</p><h3>What's the difference between a CPR and a CVR?</h3><p>A <a href="/en/earned-value/definitions/cost-value-reconciliation">CVR</a> is the standard UK construction commercial report comparing value (what you've earned from the client) against cost (what you've spent) against budget. A CPR is broader. It includes schedule performance, baseline changes, staffing, and structured variance narratives. Think of CVR as covering CPR Formats 1 and 3, with the CPR adding Formats 2, 4, and 5 on top.</p><h3>Do I need to produce a CPR on an NEC4 contract?</h3><p>NEC4 doesn't require a CPR by default. However, if the client requires earned value reporting (common on government-funded projects), the CPR structure, or its IPMR/IPMDAR successor, is usually specified in the Works Information (now Scope). On Option C target cost contracts, the data needed for CPR Formats 1-3 is largely the same data you need for the Contractor's share calculation anyway.</p><h3>How often should a CPR be produced?</h3><p>Monthly is standard on most contracts that require formal EVM reporting. Some clients request four-weekly reporting to align with NEC4 assessment dates. Either works, as long as the frequency is consistent and the cut-off dates are aligned across all data sources.</p></article></div>