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📄 665 articles in total 📅 Continuously updated 🔥 Pinned first, then sorted by rating, views and publish date
Business & Enterprise Operations · Cost & Resource Management · Cost of Quality (COQ)

Missing a Line on the Quotation Means Paying for the Customer — Four Types of Quality Cost Allocation Benchmarks and Calculation Examples

In the quotation meeting room, the cost sheet is typically laid out as follows: materials, labor, manufacturing overhead…

Quality Management System · System Framework & Standards · IATF 16949 / AS9100 Industry System Highlights

IATF16949 Practical Guide (18) | Certification Rules in Practice: Three-Year Cycle Timeline, Audit Person-Days Calculation, and Nonconformity Time Limits

A company's quality director was caught off guard during a new project bidding process with a client. The client's procu…

Six Sigma & Statistical Quality · Statistical Process Control · Control Chart Selection & Out-of-Control Analysis

Are More Out-of-Control Rules Always Better? — With All Eight Rules Enabled, False Alarm Intervals Shrink from 370 to 85 Points

Control chart software defaults to enabling all eight out of control rules, which may seem very "rigorous." However, eac…

Business & Enterprise Operations · Cost & Resource Management · Cost of Quality (COQ)

Why Some Customers Lead to Losses — Allocating Quality Costs by Customer and the Five-Step Decision-Making Method

The monthly quality cost report is out: the COQ across the entire factory is 3.1% of sales, a 0.4 percentage point decre…

Measurement, Inspection & Lab · Inspection System · Full Inspection & Sampling Decisions

Advancing QE Skills (34) | Decision-making for 100% Inspection and No Inspection: A Quantitative Balance of Cost and Risk

A certain electronics assembly company has been continuously complained to by customers for "missed inspections" over th…

Industry & Scenario Practices · Industry Focus · Automotive, Medical, Electronics, Food, Equipment Clauses & Practices

Practical IATF 16949 (17) | Comparison of Clauses between IATF 16949 and ISO 9001: Comprehensive List of Additional Requirements and Implementation Vehicles

A car parts company received a secondary supplier order from a major automaker, with the client requiring the company to…

Six Sigma & Statistical Quality · Statistical Process Control · Process Capability Cpk / Ppk

Cpk 1.35 and You Dare to Approve? —— Confidence Lower Limit and Minimum Sample Size Table

A certain automotive parts factory submitted a new project process capability report to the original equipment manufactu…

Digital Quality & Data Intelligence · QMS/QES Digitalization · Electronic Processes & Records

QM Management Depth (32) | Digital Quality Transformation: QMS System Selection and Implementation

A certain automotive parts company has an annual output value of 800 million yuan, with three factories and 1,200 employ…

Quality Management System · System Framework & Standards · IATF 16949 / AS9100 Industry System Highlights

IATF16949 Practical Guide (15) | Second-Party Supplier Audits and Development: Risk Grading Table, Audit Frequency Matrix, and Escalation Trigger Line

The annual second party audit plan of a company's quality department lists 87 suppliers. In the last column, "audit freq…

Continuous Improvement & Problem Solving · Structured Problem Solving · QC Seven Tools (Old Seven)

Pareto Chart, Scatter Diagram, and Control Chart: What Problems Do They Solve in Quality Costs —— COQ Analysis Tool Division Table

The most common way to write a quality cost report is: one line for the total amount, four categories for the proportion…

Six Sigma & Statistical Quality · Measurement & Inspection · Sampling Inspection & AQL

Advancing QE Skills (33) | Counting Sampling vs. Measurement Sampling: Which is More Cost-Effective When?

The IQC of a motor manufacturing company conducts incoming inspection on the motor shaft diameter φ20±0.05. The quality …

Quality Management System · System Framework & Standards · IATF 16949 / AS9100 Industry System Highlights

IATF16949 Practical Application (14) | Warranty Management: Disassembly Analysis of Warranty Parts, IPTV Metrics, and the Closed Loop of Failure Return

Every quarter, the OEM sends a summary of warranty claims, spanning dozens of pages. The quality manager flips to the th…