Which of the following is NOT a type of fixed-price arrangement?

In procurement and supply chain environments, fixed-price arrangements are agreements where the price is set and does not change regardless of the cost of delivering the goods or services. This provides certainty for both the buyer and the supplier regarding the financial aspects of the contract.

A firm fixed-price arrangement establishes a price that remains constant throughout the duration of the contract. This type of pricing does not allow for any adjustments based on changes in cost, making it predictable for budgeting purposes.

The firm with incentive pricing variation includes incentives for the supplier to reduce costs or complete the project ahead of schedule, which can lead to cost savings being shared, but still revolves around a fixed price.

The fixed with adjustment type of arrangement typically allows for set adjustments under predefined conditions, often related to changes in cost of materials or labor, but the initial fixed price aspect remains essential.

In contrast, "fixed with variation" does not conform to the traditional concept of a fixed-price arrangement, as it implies that the price could vary based on certain conditions, which deviates from the core principle of a fixed price. This is why it stands out as the option that does not belong to the category of fixed-price arrangements.