Half a percent. That is the share of megaprojects delivered on budget, on time, and with the benefits originally promised, according to Oxford's Bent Flyvbjerg, who studied projects spanning 104 countries and 90 years of data. Even the looser bar — on budget and on time — is cleared by just 8.5%. EGCA Consulting, reviewing more than 400 large projects, found average cost overruns of around 79% and schedule delays of 52%.
These aren't freak events. They are the base rate. And for the organisations running them, the most uncomfortable finding is this: in 74% of troubled megaprojects EGCA examined, the cause wasn't politics or bad luck. It was execution.
Execution failure rarely announces itself. It creeps. And it almost always starts in the same place — a loss of visibility.
The blind spot at the top
Large capital portfolios are sprawling: dozens of contractors, multiple funding lines, thousands of interlocking activities, and reporting that arrives weeks after the fact. Most of that data still lives in spreadsheets, slide decks, and disconnected systems. By the time a status report reaches the steering committee, it has been summarised, smoothed, and is already out of date.
The result is a leadership team flying on instruments that lag reality. They see a green dashboard while the work underneath has quietly slipped amber. Disconnected systems and inconsistent contractor reporting create blind spots that hide risk until it is too late to act cheaply.
This is the first failure — not of effort, but of sight. And it sets up the second.
No visibility, no accountability
Accountability depends on a shared, trusted version of the truth. When the numbers are late, contested, or massaged, accountability becomes impossible to enforce. A project director cannot be challenged on a slip that no one can yet see. A contractor cannot be held to a milestone when the baseline keeps quietly moving. Everyone can point to a different number, so no one owns the outcome.
What replaces accountability is optimism. Problems get reframed as "manageable." Bad news travels slowly upward, if at all. By the time the variance is undeniable, the people responsible have moved on, the contingency is spent, and the choices left are all expensive.
Then entropy takes over
Physics has a word for what happens next. Entropy — the natural drift of any system toward disorder unless energy is actively put in to hold it together.
A capital project left without clear sight and firm accountability doesn't stay still. Scope creeps. Interfaces between work packages go unmanaged. Small delays compound, because the activity that slipped last month was feeding three others this month. Decisions get deferred because no one has the full picture to make them. Each unmanaged gap widens the next.
This is why derailment so rarely looks like a single catastrophic event. It is the accumulation of a hundred unseen, unowned slippages — each individually survivable, collectively fatal. The project doesn't crash. It erodes.
Reversing the drift
The encouraging news is that entropy is reversible — but only with deliberate energy applied in the right place. The lever is the same one that failed first: visibility, converted into accountability.
In practice, that means three things working together.
First, a single source of truth — one live, trusted view of cost, schedule, and risk across the whole portfolio, fed by current data rather than month-old summaries. You cannot manage what you are seeing six weeks late.
Second, early-warning signal over comfortable reporting. The goal isn't a prettier dashboard; it is surfacing the small slip while it is still small and still cheap to fix. Leading indicators, not lagging ones.
Third, clear ownership tied to that data. When everyone is looking at the same numbers in real time, accountability stops being a confrontation and becomes a conversation. Named owners, visible commitments, no place for variance to hide.
Get those three right and the dynamic flips. Visibility creates accountability. Accountability injects the energy that holds the system together. And entropy — instead of compounding quietly in the dark — gets caught early, in the light.
The organisations that beat the base rate aren't lucky, and they aren't necessarily better at building. They are better at seeing. They have closed the gap between what is happening on the ground and what their leadership knows — and in that gap is the difference between a project that derails and one that delivers.