Post-investment reviews are conducted widely and consistently underperform. Most capital-intensive organizations run them. Few find them genuinely useful. The gap between conducting a PIR and producing one that adds value is larger than most organizations recognize, and the reason for it is almost always the same.

The PIR cannot evaluate what the governance process did not preserve.

Throughout this post, the capital approval document is referred to as an AFE (Authority for Expenditure), which is the standard term in mining and oil and gas. In energy, utilities, infrastructure, and manufacturing, equivalent documents are more commonly called a Capital Expenditure Authorization (CEA), Capital Appropriation Request (CAR), or Capital Expenditure Request (CER). The governance principles covered here apply equally regardless of the term used in your organization. For a full explanation of what an AFE is and how it differs from equivalent documents in other industries, see our guide: What Is an AFE? Authority for Expenditure Explained.

Why PIRs Are Conducted but Rarely Useful

The post-investment review exists as a governance mechanism in most capital-intensive organizations. It appears in policy frameworks, gets scheduled at project completion, and produces a report that goes to finance leadership or the Investment Committee. All of that happens, and in most cases the PIR still does not produce meaningful accountability.

The reason is structural. By the time the review occurs, the original assumptions behind the capital decision are rarely intact. The AFE was approved under specific commodity price assumptions, production forecasts, and operating cost projections. Those assumptions changed during execution. The AFE was revised, but the revision typically overwrote the original basis rather than preserving it alongside the update. The project manager who understood why specific decisions were made may have moved to a different role or left the organization. The approval rationale exists somewhere, but not in a form the PIR team can easily retrieve and rely on.

So the review team does what is available to them. They build the best baseline they can from whatever evidence remains and measure actual outcomes against that. The result is a narrative that describes what happened rather than an assessment of whether the investment delivered what was expected. The PIR becomes a reconstruction exercise rather than an accountability one.

Most organizations accept this as normal. It is not.

The Four Conditions That Make PIRs Ineffective

The original assumptions were not preserved. Capital decisions are made under specific conditions: a copper price at $4.20 a pound, a production ramp-up completing in month eighteen, an operating cost structure based on a specific labor and equipment assumption. When those conditions change and the AFE is updated, the original assumptions need to remain accessible alongside the revision. In most governance systems, they do not. The current version of the AFE reflects where the project is now, not where it started. By the time the PIR occurs, the baseline has been revised multiple times and the original is no longer retrievable without significant reconstruction effort.

The success criteria were not defined at approval. An effective PIR evaluates outcomes against criteria that were agreed upon before execution began. In practice, many organizations approve AFEs with financial projections but without explicitly documenting what a successful outcome looks like: what production rate, what unit cost, what return profile, at what point in the operational lifecycle. Without those criteria, the PIR team has no standard to measure against. They evaluate what happened without a clear picture of what was supposed to happen.

The review happens too early. A PIR conducted at project completion or commissioning captures construction and delivery performance. It does not capture investment performance. A mine expansion commissioned in month twenty-four may not reach its projected production profile until month forty-eight. A processing plant upgrade may take two to three operating years to demonstrate the efficiency gains that justified the capital. Reviewing at completion tells you whether the project was delivered well. It does not tell you whether the investment was sound. For long-lifecycle assets, the accountability picture at commissioning is incomplete at best and misleading at worst.

The PIR is treated as a compliance exercise. When the PIR exists to satisfy a governance requirement rather than to produce actionable learning, its quality degrades accordingly. The team allocates the minimum time needed to produce a report, the report describes outcomes without interrogating assumptions, and the findings produce no change in how future capital decisions are made. The PIR cycle continues, and the organization does not improve its capital allocation quality over time.

What an Effective PIR Actually Requires

An effective post-investment review is not primarily a review process. It is the downstream outcome of a governance process that began when the AFE was first drafted. The quality of the PIR is determined by the quality of the documentation that precedes it.

This means the AFE must capture not just the cost estimate but the assumptions, risk factors, and success criteria that make the cost estimate legible. It means those elements must be preserved through every subsequent forecast revision so that the PIR team can access the original basis, not just the current version. And it means the approval rationale must exist in a formal record rather than in email threads or the memory of people who may no longer be involved in the project.

When that foundation is in place, the PIR can do what it is supposed to do: compare actual outcomes against documented expectations, identify where assumptions proved incorrect and why, and produce findings that inform how the organization approaches similar decisions in the future.

In mining, this is a particularly significant challenge because the gap between AFE approval and meaningful PIR is often measured in years rather than months. A capital decision made in year two of a thirty-year Life of Mine program will not fully reveal its consequences for a decade or more. The governance infrastructure that preserves the original decision context across that span is not a reporting improvement. It is a structural requirement for accountability.

When to Conduct a Post-Investment Review

The timing of a PIR should be driven by when enough operational data exists to evaluate investment performance, not by when the construction or installation phase is complete.

For most capital projects in asset-intensive industries, this means the primary PIR should be conducted six to twelve months after the asset reaches its intended operational state. For projects with long ramp-up periods, including mine expansions, new processing facilities, and major infrastructure upgrades, the most meaningful review may not be possible until year two or year three of operations.

Organizations that manage long-lifecycle capital programs benefit from scheduling multiple PIR checkpoints tied to operational milestones rather than a single review at completion. A first checkpoint at commissioning captures delivery performance and identifies early variance from the projected ramp-up. A second checkpoint at year one captures the initial operational performance against projected production and cost profiles. A third checkpoint at year three or year five captures whether the investment delivered on its strategic rationale over a meaningful operating period.

Each checkpoint uses the original AFE as its evaluation baseline, not a revised version, and each produces findings that are documented in a form that informs the next capital decision of a similar type.

The Connection Between PIR Quality and Capital Allocation Quality

Organizations that conduct effective PIRs make better capital allocation decisions over time. This is not incidental. It is the mechanism.

When PIRs evaluate actual outcomes against original documented expectations, they reveal which types of assumptions have historically been optimistic, which project profiles have underperformed their projections, and where the approval process has accepted risk that was not adequately reflected in the business case. That information is directly applicable to the next AFE of a similar type. The organization learns from its capital history rather than repeating the same assumption errors across successive programs.

When PIRs reconstruct rather than evaluate, that learning does not happen. The organization continues making capital decisions based on assumptions that have historically been inaccurate, without a reliable mechanism for detecting the pattern. The cost compounds over time, not through any single bad decision, but through the accumulated effect of decisions made without the benefit of honest feedback from prior ones.

In mining, where capital programs operate across decades and individual decisions shape production capacity for years, the compounding effect of poor PIR quality is significant. Organizations that have built governance infrastructure capable of supporting effective PIRs, with preserved assumption histories, consistent AFE structures, and lifecycle continuity that survives team transitions, report materially stronger Investment Committee confidence and more defensible capital allocation decisions over time.

Macmahon Holdings eliminated manual spreadsheet reconciliation across its capital portfolio and reduced its CapEx approval cycle from five to six weeks to under one week after implementing structured capital lifecycle governance. The governance improvement that enabled faster approvals also enabled more reliable post-investment accountability, because the decision context was preserved throughout the lifecycle rather than fragmented across disconnected systems.

Fixing the PIR Problem

Improving post-investment review quality is not primarily a process design challenge. It is a governance infrastructure challenge. The process can be well-designed and still produce poor PIRs if the upstream conditions that make effective reviews possible are not in place.

The fix starts at the AFE. Assumptions, success criteria, and approval rationale must be documented in a form that will remain accessible through the full project lifecycle. Forecast revisions must preserve the original basis alongside the update rather than replacing it. The governance record must live in a system rather than in email threads, spreadsheets, or individual memory.

PIR timing must be tied to operational milestones rather than project completion, with multiple checkpoints scheduled for long-lifecycle assets. And the PIR must use the original AFE as its evaluation baseline, not a revised version that reflects conditions as they evolved during execution.

When these conditions are met, the PIR becomes what it was always intended to be: a genuine accountability mechanism that produces learning the organization can act on. Not a reconstruction exercise. Not a compliance report. An evaluation of whether the capital delivered what was expected, conducted against the evidence that was documented when the commitment was made.