Practice Test Geeks(CLL) Certified Lean Leader Practice Test
← All CLL Flashcard Decks

Data Analysis & Reporting Flashcards

7 cards from real CLL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Data Analysis & Reporting flashcards as text

  1. A Lean leader wants to determine if a process improvement reduced average cycle time. Which statistical test is most appropriate when comparing before and after means from the same process?

    Answer: Paired t-test

    A paired t-test compares means from the same process at two time points, controlling for process-to-process variability.

  2. What does a negative correlation coefficient (r = -0.87) between defect rate and inspection frequency indicate?

    Answer: As inspection frequency increases, defect rate decreases

    A negative r close to -1 indicates a strong inverse relationship: as one variable increases, the other decreases.

  3. In lean reporting, what is the difference between a lagging indicator and a leading indicator?

    Answer: Leading indicators predict future performance; lagging indicators confirm past results

    Leading indicators signal future outcomes (e.g., near-miss counts), while lagging indicators confirm what already happened (e.g., injury rate).

  4. A team is using a Pugh matrix to evaluate data collection methods. What is the primary function of this tool?

    Answer: Rank and compare alternatives against criteria systematically

    A Pugh matrix evaluates multiple alternatives against weighted criteria using a structured scoring approach to support decision-making.

  5. Which of the following best describes the purpose of stratification in data analysis?

    Answer: Separating data into subgroups to identify patterns within categories

    Stratification splits data by categories such as shift, machine, or operator to reveal hidden sources of variation.

  6. A value stream map shows process data boxes under each step. Which metric does NOT typically appear in these data boxes?

    Answer: Customer satisfaction score

    VSM data boxes capture operational metrics like cycle time, changeover, and uptime; customer satisfaction is a separate strategic measure.

  7. When plotting a run chart, how many consecutive data points on one side of the median constitutes a statistically significant run signal?

    Answer: 8

    Eight or more consecutive points on the same side of the median indicates a non-random run, signaling a process shift.