Negotiation is fundamentally a discussion aimed at reaching an agreement between two or more parties whose interests differ. At the heart of every negotiation lie a few structural anchors that shape strategy. Your BATNA, or Best Alternative to a Negotiated Agreement, is your fallback if no deal is reached, and knowing it defines your walk-away point while strengthening your bargaining power. Closely related is the Zone of Possible Agreement (ZOPA), the range where both parties' acceptable terms overlap, and your reservation price, the least favorable terms you would accept before walking away. Preparation around these three anchors is what allows a negotiator to stay rational under pressure.
Beyond these anchors lies the negotiator's dilemma, the central tension in any deal: you must compete to claim value while also cooperating to create it. This tension produces two broad approaches. Distributive negotiation treats the outcome as a fixed pie to be divided, while integrative negotiation seeks mutual gains by expanding the pie. Fisher and Ury's principled negotiation provides a classic framework for navigating this dilemma, urging negotiators to separate people from the problem, focus on interests rather than positions, invent options for mutual gain, and insist on objective criteria. A position is what someone says they want; an interest is the underlying need. Asking for $50,000 is a position; needing to cover a mortgage is the interest. Effective negotiation depends on hearing the interest beneath the position.
The Harvard model expands these ideas into seven elements: interests, options, alternatives, legitimacy, communication, relationship, and commitment. The Thomas-Kilmann dual-concern model adds another lens, mapping negotiation styles along two dimensions, concern for self and concern for other, to produce five styles: competing, collaborating, compromising, avoiding, and accommodating. Each style has appropriate moments: competing for vital issues, collaborating when relationships and outcomes both matter, compromising when time is short, avoiding when emotions need cooling, and accommodating to build goodwill. Choosing the right style is itself a negotiation skill.