Scenario planning

Long-lived assets, supply chains, infrastructure, and capability investments can be hard to reverse. Scenario planning helps expose hidden single-outcome assumptions before the organization commits. It can also reveal opportunities that one baseline forecast overlooks and encourage leaders to monitor weak signals.

Shell describes its scenarios as explorations of how the world could evolve under different assumptions, not predictions or its business plan. The company says scenario thinking may influence strategy as one input among many. This careful distinction is central: scenarios support judgment, while executives still choose and own the strategy.

Distinguish changed-world assumptions from a sensitivity range. A best/base/worst calculation can be useful while retaining one underlying causal story. A scenario should test how the mechanism itself changes: who can buy, what input is available or which operating rule applies. Do not attach invented probabilities merely to make the comparison look like an expected-value model.

Scenario work fails when every future is simply a best, base, and worst version of the same forecast, or when a team smuggles its preferred answer into the assumptions. It also fails when too many scenarios become impossible to compare, or when assumptions and signposts are never revisited. Keep a small set that creates real strategic tension and document the evidence behind it.

A scenario cannot remove uncertainty or tell leaders which outcome will occur. If the decision is reversible and can be tested cheaply, an experiment may be more useful than an elaborate scenario exercise. Conversely, a scenario without a decision, owner, or monitoring plan is merely a speculative narrative. Match the depth of analysis to the size and irreversibility of the commitment.

A signpost is useful only when it can be observed before the relevant commitment becomes irreversible. Identify the source, observation delay, decision owner and feasible response. The signal need not identify one world with certainty; it should be capable of changing the action. A narrative without that connection cannot guide a staged commitment.