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Process Capability Analysis Course – measuring and interpreting process quality

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Training process

Training needs analysis

If you have specific requirements regarding the training programme, we will carry out a training needs analysis for you. This will guide us on which aspects of the programme should receive greater emphasis, so that the training programme meets your specific needs.

What will you gain?

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Process capability assessment - You will learn how to judge whether a process meets quality requirements by using the right capability indices and interpreting them correctly in real operational situations.

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Correct variation interpretation - You will understand how to separate common cause from special cause variation, so you can identify quality issues more accurately and avoid misguided decisions about the process.

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Avoiding wrong analyses - You will know when Cp, Cpk, Pp and Ppk should not be calculated, how to verify process stability, and which statistical assumptions must be checked before trusting the results.

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Hands-on Cp and Cpk practice - You will practice calculating and comparing Cp, Cpk, Pp and Ppk on real data, making it easier for you to explain the difference between short-term and long-term capability.

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Linking capability with control charts - You will see how to connect capability analysis with X̄-R and X̄-S charts, confirming process stability first and then evaluating process performance against tolerance limits.

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Non-normal data analysis - You will learn how to handle data that do not follow a normal distribution by using Box-Cox transformation and suitable methods for interpreting process capability reliably.

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Working in Minitab and Excel - You will prepare measurement data, create histograms, run calculations in Minitab or Excel, and build a clear report that you can use in your day-to-day quality work.

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Corrective action planning - You will be able to turn analysis results into specific improvement actions, identify sources of excessive variation, and justify which areas of the process need attention first.

Training programme

1. Introduction to process capability analysis

  • definition and significance of process capability,
  • difference between natural and special variation,
  • the role of capability analysis in quality management.

2. Statistical basics

  • normal distribution and its significance in SPC,
  • the concept of standard deviation and variance,
  • mean, median, range – a reminder of concepts.

3. Process stability and analysis of control charts

  • assessment of process stability,
  • when capability indices can be calculated,
  • connection with X̄-R, X̄-S control charts.

4. Process capability indices

  • short-term indices (Cp, Cpk),
  • long-term indices (Pp, Ppk),
  • interpretation of results,
  • calculation examples and comparison of indices.

5. Assumptions and conditions of correct analysis

  • normality of the data distribution,
  • the impact of measurement errors,
  • sample size and the method of data collection.

6. Analysis of non-normal distributions

  • use of the Box-Cox transformation,
  • alternative capability indices for non-normal distributions,
  • visualization and interpretation.

7. Practical application in Minitab / Excel

  • preparation of measurement data,
  • creating histogram and density charts,
  • calculating Cp, Cpk, Pp, Ppk indices,
  • analysis of results and generating a report.

8. Interpretation and corrective actions

  • how to assess whether the process is capable,
  • the impact of variability on product quality,
  • identification of sources of problems and improvements.

What are the prerequisites for participating in the training?

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Basic statistics - You should be familiar with core statistical terms such as mean, median, range and standard deviation so you can follow how process data are evaluated during the course.

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Working with measurement data - You should be able to read and organize simple measurement data in a table, because during the training you will analyze process results and compare them with requirements.

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Understanding process quality - You should understand tolerances, specifications and basic quality requirements so you can interpret process capability results correctly in relation to the product.

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Using Excel or a similar tool - You should be comfortable using Excel or a similar data tool so you can complete exercises involving calculations, charts and the visual presentation of results.