The purpose of "rolled throughput yield" in the six sigma define step would include all of the following, EXCEPT:

Question

Options

• ASpotting significant differences in yield
• BProviding a baseline metric
• CUsing the calculation for customer analysis
• DAnalyzing a process flow for improvement ideas

• A
  4% (2)
• B
  2% (1)
• C
  79% (37)
• D
  15% (7)

Explanation

Rolled Throughput Yield (RTY) is an internal process metric that multiplies the first-pass yield of each process step to reveal hidden defects and rework - it is not a customer-facing analysis tool. Option C is correct because RTY is designed to evaluate process performance, not to analyze customer needs or behaviors; tools like Voice of the Customer (VOC) or CTQ trees serve that purpose.

Why the distractors are wrong:

• A is a valid use - RTY highlights which process steps have significantly lower yields, flagging problem areas.
• B is a valid use - RTY establishes a baseline defect rate before improvements begin, which is a core Define-phase activity.
• D is a valid use - mapping RTY across a process flow reveals where yield losses accumulate, generating improvement opportunities.

Memory tip: Think of RTY as a process microscope, not a customer survey - it looks inward at your steps, not outward at your customer. Any answer pairing RTY with customer analysis is the exception.

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