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A shock changes your costs, cash or deliveries within weeks: a closed route, a new tariff, a supplier in trouble. A shift unfolds over years: energy transition, new regulation, changing skills. Shocks call for a restructuring conversation; shifts call for foresight.

Some situations are both, such as a tariff that forces a relocation decision. Deal with the shock first, then make the long-lived decision with foresight.

Disruptions differ, but the first moves rarely do. Take them in this order: the first two show what is exposed, the third shows how long you have, and the last two turn that into a plan.

The first three days decide whether a disruption stays a problem or becomes a crisis. Resist the urge to switch suppliers straight away. First get the facts, then protect customers and cash, then decide between real options.

When supply is short, every customer is urgent. Without rules, stock goes to whoever pushes hardest, which damages trust and margins. Agree simple rules, apply them consistently and explain them.

Before "how do we cut cost?", ask "which link would hurt most if it broke?". Before "what will happen?", ask "which futures would change our choices?". The better question usually points to the cheaper answer.

Many single points of failure sit beyond your direct suppliers. Two "different" suppliers may buy the same component from the same sub-supplier, ship through the same port or sit in the same flood zone. A part with a long lead time, one qualified source and no stock buffer is the classic hidden risk.

A second source costs money: qualification, smaller volume discounts and more management time. It pays off when the cost of an outage, weighed by how likely it is, is higher than that. Often a cheaper middle way exists.

Good supplier relationships make risk conversations easier, not harder. Frame it as joint planning, and agree the early-warning signals both sides will share.

Safety stock protects you against two things: demand that varies and lead times that vary. The more of either, and the higher the service level you want, the more stock you need.

A common formula is: safety stock = z × √(average lead time × demand variance + average demand² × lead-time variance). Here z reflects your target service level: about 1.65 for 95%.

When deliveries slip, income often drops before costs do. Knowing how many weeks of cash you have turns a vague worry into a clear deadline.

A tariff is a shock to cost, but moving supply is a long-lived decision. First establish the real impact, then decide whether to absorb it, pass it on or re-source. Check classification and origin rules with a customs adviser: they decide what you actually pay.

Unit price rarely tells the full story. Total landed cost includes freight, duties, stock in transit, lead time, quality and the cost of disruption. And because a new site or supplier base lasts many years, the decision should hold up in more than one future.

No team can track everything. These six shifts affect most supply chains. Pick the two or three most relevant to your decisions and watch them closely.

A foresight scan does not predict the future. It maps the forces that could shape it, sketches several plausible futures and tests one decision against them. It helps most when a decision is long-lived, such as a site, a network design or a multi-year contract, and the outlook is uncertain.

Scenarios fail when they become interesting stories with no link to a decision. Keep them tied to a choice you must make, and to signals you can watch.

Resilience does not need a big budget. It needs a clear view of which items matter most to the people you serve, and agreements in place before you need them.

Unrequested goods can fill warehouses, block distribution and cost more to sort and dispose of than they are worth. A clear policy protects your supply chain and your donors' goodwill.