The Control Phase Flashcards
7 cards from real Lean Six Sigma Yellow Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 The Control Phase flashcards as text
What is a 'response plan' in the context of a control chart?
Answer: A predetermined set of actions to take when the process goes out of control
A response plan specifies exactly what actions operators should take when a control chart signals an out-of-control condition.
Which of the following is a visual management tool commonly used to sustain Control phase improvements?
Answer: 5S workplace organization
5S (Sort, Set in Order, Shine, Standardize, Sustain) creates visual workplace organization that makes abnormalities immediately obvious.
In statistical process control (SPC), control limits are typically set at:
Answer: ±3 standard deviations from the mean
Control limits are set at ±3 standard deviations (sigma) from the process mean, capturing 99.73% of natural variation.
What is 'process entrenchment' and why is it a risk in the Control phase?
Answer: The gradual reversion to old work habits that erodes improvements
Process entrenchment refers to employees reverting to old habits over time, which is why standardization and monitoring are critical.
A Cpk value of 1.33 generally indicates that a process is:
Answer: Capable and meeting industry minimum requirements
A Cpk of 1.33 is the widely accepted minimum threshold for a capable process, corresponding to approximately 64 DPMO.
Standard Operating Procedures (SOPs) created during the Control phase should be:
Answer: Written clearly enough for any trained operator to follow independently
Effective SOPs are written at the appropriate literacy level so any qualified operator can execute the process consistently without interpretation.
Which of the following is an example of an 'administrative control' used to sustain improvements?
Answer: Requiring a supervisor's signature to confirm a checklist was completed
Administrative controls rely on human behavior (checklists, approvals, audits) rather than physical or engineering barriers.