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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 analyst calculates the Overall Equipment Effectiveness (OEE) for a machine as 54%. Which three components multiply together to produce OEE?

    Answer: Availability, Performance, Quality

    OEE = Availability × Performance × Quality, representing the three primary loss categories in equipment effectiveness.

  2. In hypothesis testing for lean projects, what does a p-value of 0.03 tell the analyst (using α = 0.05)?

    Answer: Reject the null hypothesis; the result is statistically significant

    Since p = 0.03 < α = 0.05, the analyst rejects the null hypothesis, concluding the result is statistically significant.

  3. A team is building a dashboard to report lean metrics to senior leadership. Which principle should guide the selection of metrics displayed?

    Answer: Display only metrics directly tied to strategic objectives

    Lean dashboards should align metrics with strategic goals so leadership can assess progress on what matters most.

  4. Which tool is specifically designed to display how a continuous output variable changes in response to changes in one or two input variables?

    Answer: Response surface plot

    A response surface plot (from DOE) visually shows how a response variable changes across a range of input factor levels.

  5. A lean team finds that 78% of customer complaints come from just 3 out of 20 defect types. This observation best exemplifies which principle?

    Answer: The Pareto principle (80/20 rule)

    The Pareto principle states that roughly 80% of effects come from 20% of causes, focusing improvement on the vital few.

  6. When setting up a data collection plan for a lean project, what information should be captured for each data point collected?

    Answer: Measured value, date, time, operator, machine, and shift at minimum

    A robust data collection plan captures stratification variables alongside measurements to enable root cause analysis by subgroup.

  7. A control chart shows a process that has been in statistical control for 30 days. The team then implements a process change. What should they do to the control limits?

    Answer: Recalculate control limits using data collected after the change stabilizes

    After a deliberate process change, new control limits must be calculated from post-change data to reflect the new process baseline.