What is the recommended term to describe a warranty or promise of quality?

The recommended term to describe a warranty or promise of quality is a warranty. A warranty is a formal assurance that a product or service meets certain standards of quality and will perform as claimed for a specified period. This term is often associated with legal obligations, where the seller promises to repair or replace a product if it fails to meet those quality standards, effectively providing customers with a level of protection and confidence in their purchase.

While "guarantee," "commitment," and "assurance" all relate to promises regarding quality or performance, they differ in specific contexts. A guarantee often suggests a more unconditional promise about satisfaction or a specific outcome, while assurance implies a level of support or confidence provided to the customer, which might not encompass the same formal legal obligations as a warranty. Commitment signifies a dedication to a service or product but lacks the specific legal framing associated with a warranty. Therefore, in the context of warranties and formal promises regarding quality, "warranty" is the most precise term.