Technical Standards, Quality, & Inspection,

What is an Industrial Standard?

A documented, agreed-upon set of technical requirements, specifications, or procedures that a product, process, or system should consistently meet.

Think of it as a shared rulebook — written by experts, agreed on by industry, and used everywhere so that parts, designs, and practices are understood the same way by everyone.

• Covers dimensions, materials, tolerances, symbols, and test methods

• Created by consensus — industry experts, not one company

• Reviewed and revised periodically to stay current

• ISO 2768: General tolerances

• ANSI Y14.5: GD&T symbols

• IEEE 315: Electrical symbols

Why do Standards Matter in Engineering Technology?

• Safety: Reduce risk of failure in structures, machines, and electrical systems that people depend on.

• Compatibility: Let parts from different manufacturers fit, connect, and work together without redesign.

• Quality & Trust: Give a common benchmark customers, employers, and regulators can rely on.

• Global Trade: Allow designs and products to move across companies, countries, and borders.

What are the three standards organizations every engineer should know?

• ISO: International Organization for Standardization (Global — covers nearly every industry)

• ANSI: American National Standards Institute (United States — coordinates U.S. standards)

• IEEE: Institute of Electrical & Electronics Engineers (Global — electrical, electronics & software)

What are the details and examples of ISO in Focus?

ISO: International Organization for Standardization

Founded 1947 — based in Geneva, Switzerland

• Publishes voluntary standards used in 165+ member countries

• Covers quality systems, environment, safety, and technical specs

• Widely adopted by manufacturers seeking global market access

EXAMPLE: ISO 9001 — The world's most-used quality management system standard — sets requirements for consistent products and services.

What are the details and examples of ANSI in Focus?

Founded 1918 — based in Washington, D.C.

• Oversees and accredits standards developed within the U.S.

• Represents U.S. interests in ISO and IEC standards bodies

• Does not write every standard itself — it coordinates and approves them

EXAMPLE: ANSI Y14.5 — Defines Geometric Dimensioning & Tolerancing (GD&T) symbols used on engineering drawings.

What are the details and examples of IEEE in Focus?

IEEE: Institute of Electrical & Electronics Engineers

Founded 1963 — the world's largest technical professional org.

• Develops standards for electrical, electronic, and computing systems

• Publishes research journals alongside its standards work

• Standards often adopted internationally through ISO/IEC

EXAMPLE: IEEE 315 — Graphic symbols for electrical and electronics diagrams — a common visual language for circuits.

How are standards applied on the shop floor in a shipbuilding example?

• 1 Design: Hull dimensions & tolerances follow ISO drafting conventions so any shipyard can read the plans.

• 2 Electrical Systems: Shipboard wiring diagrams use IEEE symbol standards for consistent interpretation.

• 3 Fabrication: Welding and material specs reference ANSI/ASME codes to ensure structural integrity.

• 4 Inspection: Classification societies audit the build against these standards before certification.

A proactive, process-focused set of activities designed to prevent defects before they happen.

• Process-oriented — focuses on how work is done

• Proactive — aims to prevent problems in advance

• Applies throughout the entire project lifecycle

• Answers: “Are we following the right process?”\

IN A SHIPBUILDING / POWER PLANT SHOP:

• Auditing whether welders are certified before work begins

• Reviewing drafting standards compliance before drawings are released

• Training staff on proper measurement procedures

What is Quality Control (QC) and what are its key traits and examples?

A reactive, product-focused set of activities used to identify defects in the finished output.

KEY TRAITS:

• Product-oriented — focuses on the output itself

• Reactive — detects issues after production

• Applied at specific checkpoints or at completion

• Answers: “Does this product meet the spec?”

IN A SHIPBUILDING / POWER PLANT SHOP:

• Measuring a fabricated part against its drawing tolerances

• Visually inspecting a weld seam for cracks or porosity

• Sampling finished units before shipment

What is the side-by-side comparison between Quality Assurance (QA) and Quality Control (QC)?

• Focus: QA: Process | QC: Product

• Approach: QA: Proactive — prevents defects | QC: Reactive — detects defects

• Timing: QA: Throughout the project | QC: After production / at checkpoints

• Goal: QA: Do things the right way | QC: Find and fix what's wrong

• Typical activity: QA: Audits, training, procedures | QC: Inspection, measurement, testing

• Responsibility: QA: Whole team / management | QC: Inspectors / QC technicians

What are the types and purposes of Testing in QC?

Testing is how QC gets its evidence — a measurement or check performed against a known requirement.

• Destructive Testing: The sample is damaged or destroyed to reveal its true strength. (e.g. Tensile pull test, impact (Charpy) test)

  
  

• Non-Destructive Testing: Checks internal or surface condition without harming the part. (e.g. Ultrasonic, X-ray, dye penetrant)

  
  

• Dimensional Inspection: Verifies size, shape, and tolerances match the drawing. (e.g. Calipers, micrometers, CMM)

  
  

• Functional Testing: Confirms the system performs its intended operation. (e.g. Pressure test, load test, run-in test)

What are the steps of The Inspection Process from start to finish?

• Incoming Inspection: Raw materials & purchased parts are checked before entering production.

• In-Process Inspection: Work is checked at key stages while it's still being built.

• Final Inspection: The completed product is verified against all requirements.

• Documentation: Results are recorded to prove compliance and enable traceability.