Quality Planning & Control Charts Flashcards
7 cards from real PMI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Quality Planning & Control Charts flashcards as text
When using a c-chart, what is being measured?
Answer: The number of defects per inspection unit
A c-chart monitors the count of defects (nonconformities) per unit where the sample size is constant, following a Poisson distribution.
In quality management, 'prevention costs' are best described as:
Answer: Costs to avoid defects from occurring in the first place
Prevention costs include planning, training, and process improvement activities undertaken before production to avoid defects from ever occurring.
What is the purpose of the 'Plan-Do-Check-Act' (PDCA) cycle in quality management?
Answer: To provide a structured framework for continuous process improvement
The PDCA cycle (Deming Cycle) provides a repeating four-step iterative process for continuously improving products, processes, and services.
A project team uses a scatter diagram to analyze two variables. What conclusion can be drawn if the data points form a tight upward-sloping line?
Answer: There is a strong positive correlation between the two variables
A tight upward-sloping scatter diagram indicates a strong positive correlation, meaning as one variable increases the other tends to increase — though correlation does not imply causation.
Which PMI process group does 'Control Quality' belong to?
Answer: Monitoring and Controlling
Control Quality is part of the Monitoring and Controlling process group and focuses on measuring actual results against quality standards.
What is the key difference between 'quality planning' and 'quality assurance' in PMI's framework?
Answer: Quality planning identifies standards; quality assurance audits processes to ensure standards are followed
Quality planning identifies relevant quality standards and determines how to satisfy them, while quality assurance audits project processes to confirm standards are being properly applied.
An R-chart (range chart) is used alongside an X-bar chart primarily to monitor:
Answer: The variability or dispersion within each sample subgroup
The R-chart monitors within-subgroup variability (spread), while the X-bar chart tracks the process mean, together providing a complete picture of process stability.