Reforecast a plan when something material changes: a new strategy, new ownership, a new operating model, new pressure, a new dependency or new evidence. Finance already reforecasts when assumptions change. The organisation expected to deliver the plan deserves the same discipline, on the same triggers, before friction turns into failure.
Why reforecast the organisation, and not just the numbers?
Because the numbers depend on it. A financial reforecast updates revenue and cost when assumptions change, and the plan behind those figures still relies on the same teams, owners and handoffs. When the change also affects who decides, who delivers or what they must prioritise, the organisation needs its own second look.
The parity is the point finance leaders recognise fastest. Few finance teams would keep a budget from before an acquisition or a price shock. The organisational assumptions in the same plan are often older and less examined, and they tend to stay untouched until a milestone is missed.
What are the six moments that should prompt a reforecast?
New strategy, new ownership, new operating model, new pressure, new dependency and new evidence. Each changes what the plan asks of the organisation, or what is known about it. Any one of them is reason enough to update the view of where execution will stall and what to change first.
A new strategy changes the demand. New ownership, through an acquisition, a merger or a new investor, changes the leaders and the governance. A new operating model moves decision rights and creates handoffs. New pressure, such as a profit warning or a cost programme, changes capacity and behaviour. A new dependency, such as a key hire, a partner or a succession, puts the plan in fewer hands. New evidence, such as a missed milestone or a signal from the teams, changes what is known.
Each moment has its own page: new strategy, new ownership, new operating model, new pressure, new dependency and new evidence. The notes listed under Read next go deeper on several of them.
How often should a plan be reforecast?
Often enough that each update is small. Forecasting research finds that the most accurate forecasters revise in frequent, small steps, while weaker ones hold on to their first view or make infrequent, large changes. An annual review of the organisation is a large, infrequent revision by design, and it tends to arrive after the cost.
In practice, the six moments set the rhythm. Between them, a light review at an agreed point, such as a quarterly business review, checks whether the evidence has moved. Most of these reviews should end with a small adjustment or none. A reforecast that routinely produces large surprises is a sign the previous view was not being checked.
What does a reforecast actually change?
The judgement about where the plan will stall, the confidence in it, and the next move. A good reforecast says what changed, what that means for the organisation, where attention should now go, which condition to change first, and when to look again. It keeps the earlier view visible, so the change can be seen and learned from.
Keeping the earlier view matters. A forecast that is quietly replaced cannot be scored, and a forecast that goes unscored is hard to improve. The record of what was expected, what happened and what was changed is how an organisation learns which of its assumptions were wrong.
How do you adapt a plan without losing the strategy?
By treating adaptation as a decision with an owner and a trigger, rather than as drift. Sull and colleagues found that many organisations either react too slowly to seize opportunities or react quickly but lose sight of the strategy. Tying reforecasts to named moments keeps the response fast and anchored to the plan.
A clear rule helps: a reforecast can change the sequence, the ownership or the support around the plan without reopening the strategy, and a change to the strategy itself goes back to the people who approved it. That keeps small corrections cheap and large ones deliberate.
Where this stops
A reforecast of the organisation updates the view of where execution will strain. It does not replace the financial reforecast, predict market conditions, or make the decision about what to do. The forecasting research cited comes from geopolitical questions with clear outcomes, and organisational forecasts are harder to score, which is why the record of each reforecast matters.
How Atlas reads it
Atlas gives a plan an Execution Forecast before commitment and an Execution Reforecast when one of the six moments occurs, just as changed assumptions trigger a financial reforecast. The reforecast names what changed, translates what must now be different, and shows where attention should move and which condition to change first, then observes what happened and records what should follow.
Each judgement carries a rating, a confidence level, an owner and a review date, with the evidence for it and what argues against it. Where the signal is too weak to judge, the rating says so instead of guessing. The earlier view stays on record, so the organisation can see how its understanding of the plan has changed.
Sources
- Pavel Atanasov, Jens Witkowski, Lyle Ungar, Barbara Mellers and Philip Tetlock, Small steps to accuracy: Incremental belief updaters are better forecasters, Organizational Behavior and Human Decision Processes (2020)
- Donald Sull, Rebecca Homkes and Charles Sull, Why Strategy Execution Unravels and What to Do About It, Harvard Business Review (2015)
Questions
When a material assumption changes. For the organisation behind the plan, six moments are reliable prompts: a new strategy, new ownership, a new operating model, new pressure, a new dependency and new evidence. Between those moments, a light review at an agreed point checks whether the evidence has moved.
A forecast gives the first view of where a plan is likely to stall and what to change first. A reforecast updates that view after the plan, the context or the evidence changes, and keeps the earlier view on record so the organisation can see what it expected and learn from the difference.
Frequently and in small steps. Research from a four-year forecasting tournament found that the most accurate forecasters made frequent, small updates. An organisational view reviewed only once a year tends to change in large, late jumps, after the organisation has already absorbed the cost.
Because the financial numbers rest on organisational assumptions: who decides, who delivers and which handoffs work. A change that moves those assumptions can make a financially sound reforecast undeliverable. Reviewing both on the same trigger keeps the plan and the organisation expected to carry it consistent.
The executive who owns the plan, with input from the people closest to the changed conditions. Ownership matters because a reforecast ends in decisions: what to resequence, who takes over a critical handoff, when to look again. Without a named owner, those decisions drift back into the regular calendar.