Topic guide · 21 articles
Quality management
Quality management in manufacturing means building quality into every process and role, so defects are prevented or caught where they are made instead of found by inspection at the end of the line. Total quality management, quality at the source and poka-yoke prevent defects, FMEA ranks the risks before they turn into failures, and non-conformance reports and CAPA make sure every failure is traced to its root cause and fixed for good. These guides cover each of those practices and how to measure quality with first pass yield and the cost of poor quality.
Also useful: Quality kaizen ideas, Quality improvement ideas for manufacturing: 54 project examples
Quick guides: Poka-yoke, Reducing scrap and rework: a worked month, Material review board (MRB), Nonconformance and NCRs, Quality assurance vs quality control, Histogram, Control chart, How to improve product quality, FMEA, Total quality management (TQM), CAPA (corrective and preventive action), Layered process audit (LPA), APQP, Quality metrics, ISO 9001, ISO 9001:2026, IATF 16949, AS9100, ISO 14001, Layered process audit questions
Also: Model area 90-day plans, CAPA effectiveness check, Lean books with honest summaries
Picture gallery: Poka-yoke examples (28)
Where each quality practice fits
- 1Build it in
Prevent defects
Total quality management, quality at the source and poka-yoke. - 2Before failure
Rank the risks
FMEA scores what could go wrong before it does. - 3After failure
Trace every failure
A non-conformance report, then CAPA to the root cause. - 4Every month
Measure quality
First pass yield and the cost of poor quality.
Start here
- 1
How to Improve Production Quality in Manufacturing
5 ways to improve production quality: a quality management system, training, automation, regular quality audits and a quality culture, and why it matters.
Read the guide - 2
10 Poka-Yoke Examples from Real Manufacturing Processes
10 real poka-yoke examples from automotive, electronics, medical, pharma and aerospace lines, grouped by method: contact, fixed-value and motion-step.
Read the guide - 3
Manufacturing Defects: Types, Root Causes, and Prevention
A manufacturing defect is a flaw made in production that leaves a unit off spec. See the 7 types, common causes and how to stop repeats.
Read the guide
All 21 articles on quality management
What the 21 articles on quality management cover
- Defects and error proofing7 articles
- Measuring quality7 articles
- Quality systems and principles4 articles
- Corrective action, risk and audits3 articles
Quality systems and principles (4)
Defects and error proofing (7)
- Manufacturing Defects: Types, Root Causes, and Prevention
- Why Defects Still Reach Customers Despite Quality Control
- What Is Poka-Yoke in Lean Manufacturing?
- 10 Poka-Yoke Examples from Real Manufacturing Processes
- 3 Types of Poka-Yoke: Choosing the Right Method for Manufacturing
- Poka-Yoke: Error Proofing Methods in Manufacturing
- Designing Poka-Yoke Devices Complete Implementation Guide
Corrective action, risk and audits (3)
Measuring quality (7)
- Cost of Poor Quality: Calculation and Reduction Framework
- First Pass Yield: Definition, Calculation, and Improvement
- Gauge R&R in Manufacturing: Repeatability and Reproducibility Studies
- Measurement System Analysis: Validating Gauge Reliability in Manufacturing
- Statistical Process Control: Basics for Manufacturing Teams
- Control Charts: Reading and Interpreting Manufacturing Data
- Process Capability: Cp and Cpk Explained for Manufacturing
Key terms
- Total quality management (TQM)
- Quality at the source
- Right first time (RFT)
- Quality circle
- Poka-yoke
- Failure mode and effects analysis (FMEA)
- Corrective and preventive action (CAPA)
- Non-conformance report (NCR)
- Layered process audit (LPA)
- Cost of poor quality (COPQ)
- First pass yield (FPY)
- Gauge R&R
- Design FMEA (DFMEA)
- Production part approval process (PPAP)
- Supplier corrective action request (SCAR)
- Incoming inspection
- Defects per hundred units
Where LeanSuite helps
Quality Improvement
Log quality issues from the floor, trace each one to its root cause and follow the corrective action through to closure.
See Quality ImprovementNon-Conformance (NCR)
Moves non-conformance reports into an automated workflow and links each defect report to root-cause problem solving.
See Non-Conformance (NCR)Cost of Poor Quality
Pulls your scrap, rework and return data together, puts a dollar cost on each defect and shows engineering what to fix first.
See Cost of Poor QualityAudit Management
Build, schedule and act on any shop floor audit, from gemba walks to 5S and layered process audits, and turn every finding into a tracked improvement.
See Audit Management
Free tools
- First pass yield (FPY) calculatorFirst pass yield at each step and rolled throughput yield (RTY) across the whole process.
- Cost of poor quality (COPQ) calculatorTotal COPQ and cost of quality, and each as a share of revenue, from the four quality cost categories.
- Process capability (Cp, Cpk) calculatorCp and Cpk against your specification limits, plus Pp and Ppk from pasted measurements, with a distribution chart.
- DPMO and sigma level calculatorDPMO, defects per unit, yield and sigma level from the defects found, units checked and opportunities per unit.
- Scrap rate calculatorScrap rate, the cost of scrap per period and per year, and what reaching a target rate would save.
- Acceptance sampling calculatorRead the OC curve and the real risks of a sampling plan, find the plan for your AQL and LTPD, or size a zero-defect test.
- Pareto chart makerPaste categories and counts: sorted bars, cumulative percentage line and the vital few at the 80% line, as a PNG or SVG.
- Histogram makerPaste measurements: the histogram with automatic or chosen bins, plus mean, median and standard deviation, as a PNG or SVG.
- Box plot makerPaste one or more groups of numbers: box plots with quartiles, IQR, whiskers and outliers by the 1.5 IQR rule, as a PNG or SVG.
Free templates
- 8D report templateD0 to D8 with targets, containment counts, occurrence, escape and systemic causes, verified actions and a worked example.
- Poka-yoke worksheetEach step's errors and what they cost, the device (approach, function, method), payback, and a log that proves each device works.
- Error-proofing verification log (daily master-sample check)Each poka-yoke device proved every day or week with a known-bad sample, with missed checks counted and the hours and parts at risk worked out when one fails.
- PDCA templateOne improvement cycle on one page: plan, do, check against the goal, then standardize or adjust. PDF and Excel.
- PFMEA template (process FMEA)Failure modes, effects and causes rated for severity, occurrence and detection, with RPN before and after action.
- Control plan templateWhat is checked at each step, against which limits, how, how often, and what to do when a result is out.
- Corrective action request (CAPA) formOne problem from containment to proof the fix worked, with occurrence and escape causes and a closure check that tells you when it can close.
- Layered process audit (LPA) checklist20 yes, no or N/A checks at the station, a layer and frequency matrix, question banks for four processes and a findings table.
- Process audit checklistAudit one process from inputs to results: 32 questions graded conforms, minor or major, a product check, a score by group and a findings list.
- Non-conformance report (NCR) formA two-page NCR from the requirement against what was found to disposition and closure, and an Excel NCR log.
- CAPA log templateAn Excel CAPA tracker with status, days open, late flags and counts by source, plus a printable log and monthly review.
- Supplier corrective action request (SCAR) formA SCAR from the problem and containment asked for to the supplier's 8D-style response, verification and closure, with a filled-in example.
- First article inspection report template (AS9102 forms)The three forms in the AS9102 layout (part number, product and characteristic accountability), 22 review checks, the full and partial FAI triggers, and a worked example with one failed characteristic.
- Design FMEA (DFMEA) templateA design FMEA worksheet with S, O, D and RPN before and after action, a class column and a design rating guide.
- PPAP checklistThe 18 PPAP elements with owner, due date and status, the five submission levels and a readiness count.
- Process capability (Cpk) study sheet25 subgroups of readings with Cp, Cpk, Pp and Ppk worked out, control limits to check stability, and a histogram.
- Engineering change request (ECR) formAn ECR form with the change, what it touches, risk and approvals, and an Excel log that tracks each change to done.
- Cost of poor quality (COPQ) worksheetCost of quality by prevention, appraisal, internal and external failure, with COPQ as a share of sales.
- Standard cost variance workbookEight standard cost variances from your standards and actuals, favorable or unfavorable, proved against actual cost, with the questions to ask on the floor.
- Incoming inspection checklistReceiving inspection checks from paperwork to sample, the sampling plan, the decision, and an Excel log by supplier.
- Supplier audit checklistA supplier process audit of 32 questions scored 0 to 3, with section scores, a rating and the findings.
- Supplier scorecardMonthly PPM, on-time delivery and SCAR measures turned into points, a weighted score and a rating per supplier.
- Pre-shipment inspection checklistThe last check before shipping: part, quantity, labels, packaging, paperwork and photos, then release.
- X-bar and R control chart template25 subgroups with means and ranges, control limits from A2, D3 and D4, signal flags, both charts and a reaction log.
- I-MR chart template (individuals and moving range)Up to 100 single readings with moving ranges, limits from a baseline, five run-rule flags, both charts, a second phase and a reaction log.
- Attribute control chart template (p, np, c and u charts)p, np, c and u charts in one workbook: a chart selector, a sample size check, limits for each subgroup, signal flags and four worked examples.
- Gage R&R study sheet10 parts, 2 or 3 appraisers, 2 or 3 trials: EV, AV, GRR, PV, %GRR and ndc by the average and range method.
- Root cause analysis templateOne report from problem statement to proof: containment, evidence, analysis, verified causes, actions and the effectiveness check.
- Defect check sheetTally defects by type and day, with units inspected, defect rates, a location sheet and the week's Pareto.
- QA matrix templateDefect modes against stations in flow order: where each is made and first caught, a weight × occurrence × detection score, an AA to C class and the escapes flagged.
- Defect catalogue template with boundary samplesEvery defect with a definition, a class and the reason for it, measured accept and reject limits by zone, boundary samples, a defect log with DPU and Pareto, and an inspector agreement check.
- Is / is not analysis templateWhat, where, when and extent with is, is not, distinctions and changes, then each possible cause tested against every pair and ranked.
- 4M change management sheet (change point)A shift log of every change to Man, Machine, Material, Method or Design, the extra checks after it and when normal checks resume, with a change point board.
- Histogram templateReadings, bins set by the square root rule, a tally and counts, the spec limits drawn and the share out of spec, with the common shapes explained.
- Scatter diagram templateUp to 50 pairs with a group code, r and R², the least squares line, the quadrant count and r for each group.
- Gauge calibration logA gauge register with next due dates and status, a calibration record with as-found and as-left readings, and the steps when a gauge fails.
- Quality alert formA quality alert to post at the line, a sign-off sheet for every shift, and a log of open, expired and closed alerts.
- TQM self-assessment templateThe eight TQM principles in 24 statements you can check on the floor, scored 0 to 4 by several people, with the spread, the top 3 gaps and an action plan.
- Quality circle meeting recordA circle's charter, a one-page record for each meeting and a problem register that follows every problem from selected to closed or escalated.
- Jidoka worksheet (stop at abnormality)For one line or cell, every abnormality that should stop the work: how it is detected, how the work stops, who is called, the immediate fix and the root cause step, plus a log of real stops.
- Quality control pillar 90-day model area planThirteen weeks from the QA matrix to the QM matrix on one model area, a KPI board, the day-90 gate and expansion waves.
- HACCP plan template: hazard analysis and CCP worksheetThe Codex 12 steps in one workbook: team and product, process steps checked on site, hazard analysis with the CCP decision tree, the CCP table with completeness checks, an allergen matrix and a verification schedule.
- Mock recall template: traceability exercise worksheetTrace a finished lot back to every input lot and forward to every first customer, reconcile the quantities against a tolerance and time it against your target.
- ISO 9001 internal audit checklist (production area)46 audit questions for the production floor in 11 processes, each with its ISO 9001:2015 clause, what evidence to look for and the sample to take, plus five defined grades, a findings log, a finding report and a summary by clause.
- ISO 9001 management review kitA 90-minute agenda, data sheet, minutes and action log for the clause 9.3 review, with an Excel planner that flags the next review due.
- Measurement uncertainty budget templateA GUM uncertainty budget: Type A and B rows, divisors by distribution, sensitivity coefficients, uc, νeff, k from the t-table, U, TUR and a guard band check.
- Food plant GMP inspection checklist (21 CFR 117 subpart B)55 checks in the order of 21 CFR 117 subpart B, each citing its paragraph and saying what to look at, with a grade, finding, owner and due date; results by section and grade, a walk route and a bakery example.
- Master sanitation schedule with pre-op verificationA master list of cleaning tasks by area and equipment with frequency, chemical, lockout, who and next due date, a weekly on-time count, and the pre-operational verification log with a release step.
Free training decks
- DMAIC training presentationDefine, measure, analyze, improve and control, with the main tools of each phase, in 16 slides.
- FMEA training presentationDFMEA and PFMEA, severity, occurrence and detection, RPN and action priority, in 16 slides.
- Quality management system (QMS) training presentationWhat a quality management system is, the ISO 9001 clauses, procedures and records, corrective action and audits, in 18 slides.
- SPC and Cpk training presentationCommon and special cause variation, X-bar and R limits, reading signals, Cp and Cpk, with worked numbers, in 19 slides.
- MSA and Gage R&R training presentationThe five measurement properties, how a gage R&R study works, %GRR and ndc with worked numbers, and attribute gauges, in 19 slides.
- PPAP and APQP training presentationThe five APQP phases, gates, the 18 PPAP elements, the five submission levels and the capability criteria, in 19 slides.
- Poka-yoke (mistake-proofing) training presentationMistakes versus defects, the contact, fixed-value and motion-step methods, control and warning devices and how to design and test one, in 18 slides.
- Layered process audit (LPA) training presentationWhat a layered process audit is, the layers, how to write and ask good questions, handle a no and read the results, in 19 slides.
- 8D problem solving training presentationD0 to D8, containment, the root cause and the escape point, proving a fix and preventing repeats, in 20 slides with a team exercise.
- 4M change management training presentationMan, machine, material and method changes, rating the risk, extra checks, the change point board and closing a change, in 19 slides.
Free printable posters
- 8D problem solving posterThe eight disciplines plus D0, from forming the team to recognizing it, in one view.
- Jidoka and quality at the source posterDon't accept, make or pass on a defect, and the four steps of stopping at an abnormality.
- Poka-yoke types posterThe three poka-yoke methods with examples, and control versus warning devices.
- 7 basic quality tools posterIshikawa's seven tools, each drawn and explained in one line.
- Defect escalation poster (red tag and stop the line)What to do when you find a defect, and an escalation ladder with times to fill in.
- First piece (first article) check posterWhen to check the first part, the five steps before you run, and what to do if it fails.
- Why made, why missed posterA defect that reached a customer has three root causes to find: why it was made, why it was missed, why the system allowed it.
- 4M change points posterThe changes in people, machine, material and method that bring new defects, and four steps to manage each one.
- Correction vs corrective action posterCorrection fixes the part, containment protects the customer, corrective action removes the cause. One example through all three.
- Strong and weak countermeasures posterStronger, middle and weaker countermeasures: pick one that does not depend on someone remembering.
- Containment actions posterWhere suspect parts can be, from the station to the customer, and five steps to hold, sort and mark them.
- Hold area (quarantine) rules posterFour rules for the hold area, and the six decisions an authorized person can make about a nonconforming part.
- Quality terms poster (nonconformity, defect, concession)Eight quality words in plain language, from requirement and nonconformity to verification and validation.
- Check sheet posterFive steps to a check sheet that gives good data, and the four common kinds.
- How to read a Pareto chart posterThe bars, the cumulative line, what to count, splitting the top bar and showing the fix worked.
- Histogram shapes posterSeven histogram shapes, from bell to two peaks, cliff and comb, with what each usually means.
- Control chart rules poster (when to react)Six patterns on a control chart that signal a special cause, each drawn, and what to do when you see one.
- Measurement system basics posterWhat can go wrong with a measurement, six checks before you measure, and the usual gauge R&R guideline.
- Cp and Cpk process capability posterWhat Cp and Cpk measure, the formulas in words, and how to read Cpk from below 1.00 to above 1.67.
- First pass yield and rolled throughput yield posterFirst pass yield at three steps, multiplied into the rolled throughput yield of the line, worked out.
- QA matrix posterSix steps to list every defect, map where it is made and caught, score it and work the top of the list.
- PFMEA severity, occurrence and detection posterWhat severity, occurrence and detection mean, why action priority replaced RPN, and four rules for rating.
- How to read a control plan posterWhat each column of a control plan tells the person at the station, ending with the reaction plan.
- Layered process audit posterWho audits how often, six rules for short floor audits, and questions to start from.
- Internal audit steps posterSix steps from planning an audit to following up its findings, and the four sources of audit evidence.
- Audit score 0 to 5 posterA 0 to 5 score from not started to self-sustaining, each level defined by what you can see on the floor.
- Reactive, preventive, proactive posterFix it where it happened, check everywhere like it, design it out of the next one: one example through all three.
FAQ
Questions about quality management
Poka-yoke is a Japanese error-proofing method that prevents defects by making a human error impossible to commit or immediately visible the moment it happens. Shigeo Shingo developed it in the early 1960s, starting with a switch assembly at Yamada Electric in 1961, and it became a standard tool of the Toyota Production System. There are three types: contact methods for wrong physical attributes such as orientation, fixed-value methods for wrong quantities, and motion-step methods for wrong sequences.
The cost of poor quality (COPQ) is the total cost a plant carries because its processes do not produce good output the first time, from scrap and rework inside the facility to warranty claims, recalls and lost customers outside it. The prevention-appraisal-failure model sorts quality costs into four categories: prevention, appraisal, internal failure and external failure.
Corrective action deals with a quality failure that has already happened: it investigates the root cause and puts in a countermeasure to stop it recurring, and is triggered by events such as an NCR or a customer complaint. Preventive action deals with a risk that has not yet produced a failure, and is triggered by risk work such as an FMEA or trend data showing a process drifting toward its control limits.
First pass yield (FPY) is the percentage of units that complete a process correctly the first time, without rework, repair or scrap at any stage: good units divided by units started, multiplied by 100. It shows the capacity lost to rework that a final yield figure hides.
More topics
- Lean manufacturing fundamentals
- Kaizen and continuous improvement
- Root cause analysis and problem solving
- TPM and maintenance
- 5S and visual management
- Value stream mapping and flow
- Standard work, SOPs and training
- Safety management
- Lean leadership and employee engagement
Or see every topic, the full library and the lean glossary.
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