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Requirement

Quality, capability or service that a product, process or the person involved in the process must fulfill or possess to fulfill a contract, a standard, a specification, or other formally specified documents.

When the term “requirements” is used in relation to technical products, it refers to a detailed description of the functionalities, performance features, quality characteristics, and other aspects that a product must fulfill in order to meet its users’ needs and expectations. These requirements provide the basis for developing, designing, and manufacturing the product.

In FMEA, “nonfunctional requirements” pose a challenge and shouldn’t really be handled as functions unless they can be reasonably resolved.

More on this in the professional article, "When functions are confused with requirements, trouble looms. A different strategy is needed."
Glossary Technical terms at a glance

R

RAMS Reliability Requirement Requirement management Residual risk Risk Analysis Risk Evaluation Risk Matrix Risk priority number Robust design Robust process

S

Sample Sampling Scoping Scrum Single minute exchange of die Six Sigma Solution principle Special Characteristics Specification State Statistical process control Structural tree Structure Analysis System System element System Optimization System response