Final answer:
The technique for identifying requirements is 'd. Brainstorming,' which is a structured approach used early in the design process to generate a wide range of ideas that can meet the project's requirements and constraints.
Step-by-step explanation:
The technique for identifying requirements out of the options provided is d. Brainstorming. This involves exploring a wide variety of ideas and possible solutions in the early stages of the design process. The goal is to generate a broad range of ideas that can be shaped into a component, system, or process to fulfill the set of requirements and constraints. Techniques such as mind searches, design sessions, and idea dumps are employed. Engineers often use a structured approach during brainstorming to define the design problem by gathering information from various sources, including customers. Such a process can lead to improved design through the iterative cycles of prototyping, testing, evaluating, and refining the design to better meet the criteria.
Brainstorming differs from the other options since user acceptance testing, performance testing, and code review are all related to validation and verification of the design or code against the requirements, rather than the identification of those requirements.