A vendor opens at 180k. Before the call, the buyer's comparable deals and internal value model supported a range around 120k to 140k.
Decision situation
Negotiation
Protect a negotiation from the first number and from pressure to justify a position already taken.
Deep decision guide · reviewed 2026-09-10
The first number is information, not gravity.
How do we use the other side's offer without letting it define our range?
Negotiations often begin with a number before both sides have exposed the evidence behind it. That number can become the reference point for later judgments, while public positions make it harder to update without feeling inconsistent.
A better process keeps the independent range, the reservation point and the reasons for changing them visible. The goal is not to ignore the first offer. It is to evaluate it as new information instead of quietly rebuilding the whole analysis around it.
A better review
Run the decision in five moves.
- 1. Set an independent target range, reservation point and best alternative before receiving or discussing the other side's first number.
- 2. Write the evidence behind the range: comparable prices, value, costs, constraints and important unknowns.
- 3. Separate underlying interests from the public position so more than one package can satisfy the real objective.
- 4. Define which new facts would move the reservation point and which facts would not.
- 5. After an anchor arrives, recalculate from the evidence before making a counteroffer instead of starting from the other side's number.
Worked example
The 180k opening offer
The team treats 180k as the new reality and argues about whether a midpoint near 160k would be a fair compromise.
The team returns to the independent range, checks whether the offer revealed any new facts, updates only for evidence that matters and builds a counterproposal around price, scope and terms rather than splitting the first number.
Decision record
Write down the parts that are easiest to rewrite later.
- Independent target range before the first offer.
- Reservation point and best alternative.
- Evidence and comparables behind the range.
- Facts that would justify an update.
- Alternative packages that protect the same interests.
Practice the decision
Try the reasoning before the stakes are real.
A supplier opens at €120 per unit. The buying team immediately discusses whether €105 would be a good deal, although no independent range was prepared.
Try the scenario →A team publicly announced that it would never accept a contract longer than one year. New evidence shows a longer term could reduce total risk, but every analysis is now used to defend the public position.
Try the scenario →Evidence boundary
Useful lens, not a diagnosis.
Anchoring is well supported in numerical judgment, but a negotiation also depends on alternatives, information, incentives and bargaining power. Movement toward an opening offer is not, by itself, proof that anchoring caused the decision.
This guide uses the project's anchoring evidence and existing negotiation practice. It is a decision-review procedure, not legal or commercial advice.
Signals to notice
Reasons to slow down and check.
- The first offer is setting the range.
- The team cannot explain its independent reservation point.
- New evidence is being used only to defend the public position.
Questions before action
Make the missing evidence visible.
- What is our independent estimate before the anchor?
- What evidence changes our reservation point?
- Which alternative package would meet the same underlying interests?
Relevant lenses
Concepts that may help you test the reasoning.
Use this concept as a question to test the decision, not as a label for a person.
Open →Use this concept as a question to test the decision, not as a label for a person.
Open →Use this concept as a question to test the decision, not as a label for a person.
Open →Practical moves
Do something different, not only notice a label.
Create a reference point before seeing a strong external number or recommendation.
Open →Decide in advance what evidence should cause a forecast or decision to change.
Open →Force a preferred explanation to compete with a credible alternative.
Open →Skill to develop
Decision making under uncertainty
You can make a decision without pretending uncertainty has disappeared.
Practice this situation
Choose a useful first move.
A supplier opens at €120 per unit. The buying team immediately discusses whether €105 would be a good deal, although no independent range was prepared.
Skill: Decision making under uncertaintyOpen scenario →A team publicly announced that it would never accept a contract longer than one year. New evidence shows a longer term could reduce total risk, but every analysis is now used to defend the public position.
Skill: Decision making under uncertaintyOpen scenario →