Building rapport sets apositive tonefor the negotiation and encourages openness. It is particularly vital during theopening phase, where first impressions are formed, and trust begins to build. Trust facilitates moreconstructive dialogue, enhances collaboration, and helps parties exploremutual interests.
"Developing rapport at the start of negotiations helps to foster trust and cooperation. This enhances the likelihood of reaching agreements that are mutually beneficial." (L4M5 Commercial Negotiation, 2nd edition, Section 3.4 - The Opening Phase and Relationship Building)

There are two major persuasion methods: 'push' and 'pull'.
Persuasion can be defined as encouraging someone to do something that you want them to do for you.
Persuasion is reasoning with someone so that they will believe or do something they might not otherwise do.
Persuasion can be considered as 'pushing' on TOP so that they can accept the change in attitude or behaviour as a result of your actions.
Influence is the ability to affect the manner of thinking of another. Influence can be considered as pulling on TOP so that you achieve the same result, but TOP feels they have changed their attitude or behaviour as a result of their reflection and thinking, and not your direct actions.
There are multiple variables to consider when choosing between 'push' and 'pull'. Professor Fiona Dent of Ashridge Business School proposes situations when each style might be most appropriate, breaking down push into 'directive' and 'reasoning' and 'pull' into 'collaborative' and 'visionary':
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In the scenario, Rose intends to let both parties exchange their views and ideas so that solutions to current problems can be found. This is the typical characteristic of collaborative (pull) method.

Trust is the expectation that the other party will behave in a predictable and mutually acceptable way. In inter- firm relationships, the presence and absence of trust can affect the level of cost in a relationship. The existence of trust is taught to lower the transaction cost in a relationship. Dr. Mari Sako identified taxonomy of 3 types of trust in commercial relationship, which is very useful from the perspective of procurement.
Contractual trust: Trust based on the contract with TOP. This is potentially the weakest source of trust if there is nothing else to base the trust on, but it is the quickest to establish.
Competence trust: Trust based on TOP's professional qualifications or proven or certified technical capability or experience.
Goodwill trust: Trust based on knowing TOP has your interest at heart and will not behave opportunistically.
This is potentially the strongest type of trust, but it takes the longest time to build.
Otherwise, trust also has legal meaning. A trust is a legal document that can be created during a person's lifetime and survive the person's death. A trust can also be created by a will and formed after death. Charitable trusts are trusts which benefit a particular charity or the public in general.

Reference: CIPS L4M5 Study Guide, Section 1.1 - Types of Commercial Relationships

BATNA (Best Alternative to a Negotiated Agreement) gives negotiators a fallback plan if discussions fail. It ensures they never accept worse terms than their minimum acceptable alternative. For Maria, developing a BATNA mitigates rejection risk, strengthens her bargaining power, and provides confidence. Without a BATNA, negotiators risk over-conceding or being locked into unfavourable deals. CIPS emphasises that BATNAs must be realistic, actionable, and aligned to organisational objectives-not merely theoretical alternatives.
Reference: CIPS L4M5 (2nd ed.), LO 2.2 - Negotiation planning tools: BATNA and walk-away points.