Which of the following tools is used to translate broad requirements into specific requirements?

Question

Options

• AA quality control plan
• BThe theory of constraints (TOC)
• CA critical to quality (CTQ) tree
• DA process flowchart

• A
  4% (2)
• B
  2% (1)
• C
  93% (50)
• D
  2% (1)

Explanation

A Critical to Quality (CTQ) tree is specifically designed to translate broad, vague customer requirements (like "fast service" or "high quality") into specific, measurable characteristics that can be acted upon - making it the right tool for this exact purpose.

Why the others are wrong:

• A (Quality control plan): A QC plan documents how quality will be monitored and controlled; it doesn't decompose requirements.
• B (Theory of Constraints): TOC is a management philosophy focused on identifying and eliminating bottlenecks in a process - not for translating requirements.
• D (Process flowchart): A flowchart maps the steps in a process visually; it doesn't convert high-level needs into measurable specs.

Memory tip: Think of a CTQ tree like a family tree - you start with one broad "ancestor" requirement at the top and branch it down into increasingly specific "descendants" (drivers → requirements). The word tree in the name is a literal hint about its structure and purpose.

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