Freelance Quality Management Services

Quality Control

In the ISO 9000 standard, clause 3.2.10 defines Quality Control as:
“A part of quality management focused on fulfilling quality requirements”.

Quality control includes all operational techniques and activities used to verify fulfillment of quality requirements.

These techniques and activities follow the interests of the customers and/or stakeholders.

Quality control is used to measure and verify the compliance level.

Quality Control Tools and Techniques

Cause and Effect Diagram (also known as Fishbone Diagrams or Ishikawa Diagrams)

Cause and Effect Diagrams are a kind of a mindmap used in cause and effect analysis as a method to unveil and categorize actionable root causes of a certain condition. Cause and Effect Diagrams have been developed by Professor Kaoru Ishikawa, a Japanese quality management pioneer in the 1960s.


Flowcharts are used to visualize the sequence and branches of activities as well as decision points.


Checklists are sheets to organize routine jobs when gathering data.

Pareto Chart

Pareto Charts are bar graphs that display variances by the number of their occurrences. Variances are shown in their descending order to identify the largest opportunities for improvement.


Histograms are bar charts that describe and control the distribution of statistical data.

Scatter Diagram

Scatter Diagrams are two or three dimensional charts that present the density and direction of plotted points indicating the type of their relationship.