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Engineering Drawing Interpretation

Root cause failure analysis consistently reveals that many manufacturing technicians and inspectors lack basic engineering drawing interpretation skills.  Engineering Drawing Interpretation is a 10-class, 20-hour program of instruction focused on developing manufacturing and quality assurance technician abilities to read and understand engineering drawings. The Engineering Drawing Interpretation program provides manufacturing and quality assurance personnel with the ability to:

  • Understand basic engineering drawing concepts and definitions, including drawing title blocks, views, datums, zones, notes, parts lists, and other features.

  •  Interpret basic dimensions and tolerances, including geometric dimensioning and tolerancing.

  • Understand drawing features unique to the client's industry.

  • Understand basic configuration management concepts.

The Engineering Drawing Interpretation program can be presented on site either after hours or prior to the start of the work day in 2-hour sessions, 1 day per week, for 10 weeks.   The training approach includes an initial drawing interpretation skills assessment, lectures, interactive discussion, training exercises, and a final examination.


  • Elementary Blueprint Reading for Machinists, David L. Taylor, Delmar Publishers.

  • Modern Geometric Dimensioning and Tolerancing, Lowell W. Foster, NTMA Publishers.

  • Class notes, homework assignments, examinations, and other materials.

Who Should Attend

Manufacturing supervisors, manufacturing lead personnel, manufacturing technicians, quality assurance supervisors, and quality assurance inspectors should attend this training.

Engineering Drawing Interpretation Syllabus

  • Class 1:  Introduction to Engineering Drawings.  Initial drawing interpretation examination.  The need for engineering drawings.  Actions involved in producing and issuing drawings.  Drawing reproduction.  Where drawings are needed and who uses them.  Level 1, 2, and 3 drawings.  ANSI Y14.5 overview.  Homework assignment.

  • Class 2:  Engineering Drawings and Drawing Control.  Initial drawing examination results review. Drawings encountered in the manufacturing environment.  Assembly, detail, altered item, mechanical schematic, exploded assembly, and tooling drawings.  Engineering changes and the configuration management process.  The ECO process.  Drawing control systems.   Class exercise. Homework assignment.

  • Class 3:  Drawing Arrangement and Views.  Drawing structure.  The need for different drawing sizes.  Locating information using zones.  Drawing notes and parts lists.  Title, tolerance, and application blocks.  Drawing views.  Basic orthogonal projection concepts.  One, two, and three view drawings.  Auxiliary views.  Class exercise.  Homework assignment.

  • Class 4:  Dimensioning Fundamentals I.  Drawing scales and units of measure.  Fractions and decimals.  Line types and line interpretation.  Size and location dimensions.  Angular dimensions. Hole dimensions.  Pattern dimensioning features.  Simple dimensioning and tolerancing.  Class exercise.  Homework assignment.

  • Class 5:  Dimensioning Fundamentals II.  Countersinks, counterbores, and spot faces.  Machining symbols.  Screw threads.  Minimum and maximum tolerance conditions.  Unilateral and bilateral tolerance conditions.  Baseline and chain dimensioning.  Mating parts tolerance evaluation. Tolerance accumulation.  The relationships between processes, statistical process control, and tolerances.  Class exercise.  Homework assignment.

  • Class 6:  Introduction to Geometric Dimensioning and Tolerancing.  Fundamental geometric dimensioning and tolerancing principals.  Basic dimensions.  Feature control frames and placement.  Datum feature symbol and placement.  Other geometric symbols. Regardless of Feature Size considerations.  Relationship of form to size.  Class exercise.  Homework assignment.

  • Class 7:  Location Tolerance Fundamentals I.  Positional tolerance methods.  Comparing positional tolerance zone to coordinate tolerance zone.  Maximum material condition considerations.   Interpreting and applying “bonus” tolerances.  Class exercise.  Homework assignment.

  • Class 8:  Location Tolerance Fundamentals II.  Floating fasteners.  Fixed fasteners.  Interpreting specified and implied datums.  Inspection setup approaches.  Statistical tolerancing considerations. Common geometric dimensioning and tolerancing interpretation problems.  Class exercise. Homework assignment.

  • Class 9:  Form and Orientation Tolerance Fundamentals.  Flatness, straightness, circularity, and cylindricity.  Perpendicularity, angularity, and parallelism.  Surface and line profiling.  Application examples.  Class exercise.  Homework assignment.

  • Class 10:  Course Review and Summary.  Course material review.  Questions and answers. Final examination.


The above training can be customized to meet your requirements.

Need a guest speaker for an important luncheon or dinner meeting?  Please contact us.

Any questions?  Please call us at 909 204 9984 or contact us via email.

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