Professional buyer is planning for the next negotiation of a simple one-off contract.

Professional buyers, when planning or engaging in negotiation with suppliers, should always be aware of where the intended and actual relationship with this supplier is positioned on the 'spectrum' or 'continuum' of commercial relationships. The relationship spectrum describes the range of commercial relationships between a buyer and supplier based on richness of communication, longevity and mutual dependence.

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In the question, the contract is simple one-off (or spot buy), which means the relationship will likely to be more transactional. In such relationship, price is the most important criteria and buyer may adopt arm's-length approach.