Engineering drawings communicate geometry (shape and location), dimensions and tolerances to a degree of accuracy and precision that is required for each part.

Common features of an engineering drawing:

• shape of an object/part - represented by multiple views and projections
• dimensions - size of object in accepted units
• tolerances - allowable variation for each dimension
• material - represents what object is made of - where appropriate
• finish - specifies surface quality - where appropriate
• dimensions and tolerances are valid at 20 °C unless stated otherwise

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Good practice online modules

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• Dimensional
• Overview of basic design and interpretation of an engineering drawing
• An introduction to datum
• An introduction to geometric tolerancing
• An introduction to the designer's role when designing a component
• An introduction to the manufacturer's role when designing a component
• An introduction to the inspector's role when designing a component