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Statistical Process Control (SPC) in Practice Control Chart
Published 9/2026
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Language: English | Duration: 1h 7m | Size: 996.98 MB
Master X-bar & R, I-MR and p charts, process stability, special causes and capability using a practical automotive case
What you'll learn
Understand common-cause and special-cause variation and their importance in process control.
Correctly distinguish specification limits from statistical control limits
Select and interpret X-bar & R, I-MR and p control charts for different manufacturing situations
Understand rational subgrouping and develop meaningful SPC sampling strategies
Calculate and interpret centre lines and control limits
Recognise potential statistical signals and investigate credible special causes
Understand why process stability should be established before interpreting Cp and Cpk
Connect Control Plan → MSA → SPC → Process Capability → PPAP using a worked automotive case study
Requirements
No previous SPC experience is required.
Basic knowledge of manufacturing, inspection or quality engineering is helpful but not essential
Students should have Microsoft Excel or compatible spreadsheet software if they wish to follow and reuse the downloadable SPC workbook
Description
Learn how to use data to understand whether a manufacturing process is stable, predictable and capable of consistently meeting requirements.
Statistical Process Control is often reduced to plotting a control chart and checking whether points fall outside the limits. In practice, SPC is a decision-making system for understanding process variation, detecting meaningful change and reacting before variation becomes a customer problem.
This course teaches SPC through a practical ADC12 aluminium automotive water pump housing case study.
You will follow the critical 32.000 ±0.020 mm main bore from the Control Plan and validated measurement system into ongoing statistical process monitoring
UNDERSTAND PROCESS VARIATION
Every manufacturing process varies.
The key question is whether that variation represents the normal behaviour of the process or whether something unusual has changed.
You will learn the difference between
• Common-cause variation
• Special-cause variation
• Natural process variation
• Specification requirements
• Control limits
One of the most important lessons in the course is that specification limits and control limits are not the same thing.
SELECT THE RIGHT CONTROL CHART
Different data and production conditions require different SPC approaches.
The course covers
X-BAR & R CHARTS
Use rational subgroups to monitor both the process average and within-subgroup variation.
The ADC12 main-bore case study demonstrates how repeated dimensional measurements can be organised into subgroups and monitored using X-bar and Range charts.
I-MR CHARTS
Learn how Individuals and Moving Range charts can be used when measurements are naturally collected one at a time rather than in rational subgroups.
P-CHARTS
Learn how attribute data can be monitored by tracking the proportion of nonconforming units when sample sizes are appropriate for this type of analysis.
RATIONAL SUBGROUPING
A control chart is only as useful as the sampling strategy behind it.
You will learn why rational subgrouping matters and how poor subgroup selection can hide process changes or create misleading signals.
BUILD AND INTERPRET CONTROL LIMITS
You will learn the logic behind
• Centre lines
• Upper Control Limits
• Lower Control Limits
• X-bar chart limits
• Range chart limits
• Moving Range limits
• Attribute chart limits
The emphasis is not simply on calculating limits, but on understanding what those limits tell you about process behaviour.
DETECT SPECIAL-CAUSE SIGNALS
An unstable process should not be treated as though it is predictable.
Using the worked case study, you will see how unusual process behaviour can indicate changes such as
• Tool wear
• Incorrect offsets
• Fixture movement
• Material changes
• Measurement problems
• Operator or method changes
• Equipment deterioration
The course demonstrates how to investigate a statistical signal rather than simply adjusting the process every time a measurement moves.
SPC REACTION PLANS
A useful SPC system needs a defined reaction strategy.
You will learn how to respond to an out-of-control signal by considering
• Process containment
• Suspect product
• Last-known-good product
• Verification of the measurement system
• Investigation of potential special causes
• Correction
• Verification before restart
• Escalation and documentation
PROCESS STABILITY BEFORE CAPABILITY
A capability number can look impressive while hiding an unstable process.
The course therefore reinforces the correct logic
Measurement System Suitable → Process Stable → Capability Evaluated
You will understand the relationship between SPC and capability indices such as Cp and Cpk and why capability should be interpreted in the context of process stability.
SPC AND THE AUTOMOTIVE CORE TOOLS
Throughout the course, SPC is connected to the wider quality-planning system
PFMEA → Control Plan → MSA → SPC → Process Capability → PPAP → Production Feedback
For the ADC12 main bore
• PFMEA identifies machining risk.
• The Control Plan defines the characteristic and control method.
• MSA validates the measurement system.
• SPC monitors ongoing process behaviour.
• Capability evaluates performance relative to specification.
• PPAP captures the initial evidence.
• Production data continues to provide feedback after launch.
PRACTICAL DOWNLOADABLE SPC EXCEL WORKBOOK
Students receive the practical workbook used throughout the course, including
• SPC planning
• X-bar & R charts
• I-MR chart
• p-chart
• Rational subgrouping example
• Control-limit calculations
• Special-cause training scenario
• SPC reaction plan
• Process capability integration
• SPC summary
• Worked ADC12 automotive case study
BY THE END OF THIS COURSE
You should be able to select an appropriate SPC chart, organise meaningful process data, establish and interpret control limits, distinguish common and special causes, respond appropriately to abnormal signals and understand when process capability results can be trusted.
The objective is not simply to create charts.
It is to use statistical evidence to make better manufacturing decisions.
What Students Will Learn
• Understand common-cause and special-cause variation and their importance in process control.
• Correctly distinguish specification limits from statistical control limits.
• Select and interpret X-bar & R, I-MR and p control charts for different manufacturing situations.
• Understand rational subgrouping and develop meaningful SPC sampling strategies.
• Calculate and interpret centre lines and control limits.
• Recognise potential statistical signals and investigate credible special causes.
• Develop practical reaction plans for unstable or abnormal process behaviour.
• Understand why process stability should be established before interpreting Cp and Cpk.
• Connect Control Plan → MSA → SPC → Process Capability → PPAP using a worked automotive case study.
Course Requirements
No previous SPC experience is required. Basic knowledge of manufacturing, inspection or quality engineering is helpful but not essential. Students should have Microsoft Excel or compatible spreadsheet software if they wish to follow and reuse the downloadable SPC workbook. For live applications, applicable customer-specific requirements, organisational procedures and official industry guidance should be followed.
Who this course is for
• Quality Engineers responsible for SPC, capability and production quality.
• Supplier Quality Engineers reviewing supplier statistical process-control evidence.
• Manufacturing and Process Engineers responsible for controlling process variation.
• Production Engineers and Supervisors who need to interpret process behaviour and abnormal signals.
• APQP and PPAP Engineers responsible for initial process studies and launch validation.
• Quality Managers responsible for Automotive Core Tools implementation.
• Engineers working in automotive or IATF 16949 manufacturing environments.
• Professionals who currently calculate Cp/Cpk but want to understand the importance of process stability.
• Engineering and quality students seeking practical SPC experience
Who this course is for
Quality Engineers responsible for SPC, capability and production quality.
Supplier Quality Engineers reviewing supplier statistical process-control evidence
Manufacturing and Process Engineers responsible for controlling process variation
Production Engineers and Supervisors who need to interpret process behaviour and abnormal signals
APQP and PPAP Engineers responsible for initial process studies and launch validation
Quality Managers responsible for Automotive Core Tools implementation
Engineers working in automotive or IATF 16949 manufacturing environments
Professionals who currently calculate Cp/Cpk but want to understand the importance of process stability
Engineering and quality students seeking practical SPC experience
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