Idea bank · Quality management
Quality improvement ideas for manufacturing: 54 project examples
Short answer
Most quality improvement in a plant comes from stopping defects at the step that makes them, not from checking more. Below are 54 quality improvement project ideas for manufacturing, from supplier scorecards and mistake-proofing to gauge studies and 8D reports. Each has the problem it fixes, the effort it takes, the cost-of-quality bucket it acts on and the free template that helps. Filter by area, by bucket or by effort, and start from your biggest defect.
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These are common practices, not results from any one plant, so we give no defect rates or savings. Count your own defects and costs first, and pick the idea that acts on the largest one.
Where the 54 ideas sit
| Where it acts | Prevention | Appraisal | Internal failure | External failure | Ideas |
|---|---|---|---|---|---|
| Suppliers and incoming material | 4 | 4 | 1 | none | 9 |
| Process control | 8 | none | 1 | none | 9 |
| Inspection and measurement | 3 | 6 | none | none | 9 |
| People and standards | 7 | 1 | 1 | none | 9 |
| Defects and problem solving | 2 | none | 5 | 2 | 9 |
| Customers and the quality system | 3 | 2 | 2 | 2 | 9 |
The same 54 ideas by effort
- Low effort: 29 ideas
- Medium effort: 23 ideas
- High effort: 2 ideas
A grid of the 54 ideas counted by where it acts and by cost of quality. Suppliers and incoming material: 9 ideas. Process control: 9 ideas. Inspection and measurement: 9 ideas. People and standards: 9 ideas. Defects and problem solving: 9 ideas. Customers and the quality system: 9 ideas. By effort: 29 low effort, 23 medium effort, 2 high effort.
Where to start: effort by area
6 low3 medium
- Process control9 ideas
3 low6 medium
- Inspection and measurement9 ideas
4 low4 medium1 high
- People and standards9 ideas
7 low2 medium
- Defects and problem solving9 ideas
7 low2 medium
2 low6 medium1 high
Each where it acts with its ideas counted by effort. 29 of the 54 ideas are low effort. Suppliers and incoming material: 6 low, 3 medium, 0 high. Process control: 3 low, 6 medium, 0 high. Inspection and measurement: 4 low, 4 medium, 1 high. People and standards: 7 low, 2 medium, 0 high. Defects and problem solving: 7 low, 2 medium, 0 high. Customers and the quality system: 2 low, 6 medium, 1 high.
Where it acts
Effort
Showing 54 of 54 ideas
Suppliers and incoming material (9)
Ideas for stopping defects before they reach your line: scorecards, limit samples, sampling and returns.
- Low effort
- Prevention
- Problem
- Suppliers are judged on price and delivery, and quality problems are argued about from memory.
- Idea
- Record defects found at receiving by supplier, share a simple score each month and agree an action with the worst two.
- Low effort
- Appraisal
- Problem
- A new part or a new supplier starts at the normal level of checking, and the first problems reach the line.
- Idea
- Raise the sample for the first deliveries, check against the drawing, and drop to the normal level only after clean lots.
- Low effort
- Prevention
- Problem
- A scratch or a colour is rejected by one inspector and accepted by another, and the supplier cannot tell what is allowed.
- Idea
- Keep a physical sample or a photo of the worst acceptable condition, agree it with the supplier and put it at receiving.
- Low effort
- Internal failure
- Problem
- Bad material sits in quarantine for weeks and the supplier answers when nobody remembers the details.
- Idea
- Send a corrective action request with photos, counts and the lot number the same day, and set a date for the reply.
- Medium effort
- Prevention
- Problem
- The first time anyone sees the supplier's process is after a major failure.
- Idea
- Agree a visit to the suppliers with the most risk, walk their process with a checklist and agree the controls for your critical points.
- Low effort
- Appraisal
- Problem
- Material waiting for inspection is mixed with released stock and ends up on the line.
- Idea
- Use separate marked areas and a label for each status, and record who released what and when.
- Medium effort
- Prevention
- Problem
- Material is used in the order it is easiest to reach, and old stock expires or degrades.
- Idea
- Set up first-in, first-out lanes with a limit and a visible date so the oldest material is used first.
- Low effort
- Appraisal
- Problem
- Receiving checks what is easy to check, not what matters to the customer.
- Idea
- List the few characteristics that matter, the way to check each and the sample size, and keep the sheet at the desk.
- Medium effort
- Appraisal
- Problem
- Every part gets the same checking, so risky parts are under-checked and safe ones are over-checked.
- Idea
- Rank the parts by what a defect would cost the customer, and set the sample size and the acceptance rule by rank.
Process control (9)
Ideas that keep the process on target: mistake-proofing, first-piece checks, charts, set-ups and standard work.
- Medium effort
- Prevention
- Problem
- The same slip, such as a part fitted the wrong way, produces defects whatever people are told.
- Idea
- Change the part, the fixture or the sequence so that the wrong way is not possible, and test the device on a known bad part.
- Low effort
- Prevention
- Problem
- A set-up is wrong and a whole batch is made before anyone notices.
- Idea
- Make the operator check the first piece against the drawing and a limit sample, and release the run only after it passes.
- Medium effort
- Prevention
- Problem
- The dimension is checked against the limits only, so the process drifts to the edge before anyone acts.
- Idea
- Plot the measurement on a control chart at the machine, mark the rules for action and let the operator adjust before parts are out of limits.
- Low effort
- Prevention
- Problem
- Each set-up person uses a different setting, so quality depends on who is on shift.
- Idea
- Record the settings that give good parts, put them on the machine and update them when a better setting is found.
- Medium effort
- Prevention
- Problem
- A tolerance is accepted without anyone knowing whether the process can hold it.
- Idea
- Run a capability study on the critical characteristics, compare the spread with the tolerance and act first on those that fall short.
- Medium effort
- Prevention
- Problem
- Two operators do the same job differently and get different results.
- Idea
- Write the best known method with the key points and the reasons, train to it and use it as the base for the next improvement.
- Medium effort
- Prevention
- Problem
- A worn tool is used until it makes bad parts.
- Idea
- Find how many parts a tool makes before quality slips, change it before that point and log the change.
- Low effort
- Internal failure
- Problem
- Parts are damaged by stacking, handling or open bins between steps.
- Idea
- Use dividers, trays or covers, and check which damage is found at the next step to see where it starts.
- Medium effort
- Prevention
- Problem
- The control plan was written at launch and does not cover the defects found since.
- Idea
- Compare it with the last year of defects and complaints, add controls where escapes occurred and remove those that catch nothing.
Inspection and measurement (9)
Ideas for gauges, check sheets, checklists and catching a defect where it is made.
- Medium effort
- Appraisal
- Problem
- Two inspectors measure the same part and get different answers.
- Idea
- Run a gauge study with several people and parts, and fix or replace the gauge whose variation is large against the tolerance.
- Low effort
- Appraisal
- Problem
- Nobody knows which gauges are due, and a gauge out of calibration is found at an audit.
- Idea
- Label each gauge with its due date, keep a log and take any gauge past its date out of use.
- Low effort
- Appraisal
- Problem
- Defects are known by feel and the arguments are about opinions.
- Idea
- Give each station a check sheet with the common defect types, tally every defect found and review the tally at the end of the shift.
- Medium effort
- Prevention
- Problem
- A defect is found two steps after it was made, and several parts are affected.
- Idea
- Have the operator check the key feature straight after the step and stop if it is wrong.
- Low effort
- Appraisal
- Problem
- Inspectors disagree about what counts as a defect.
- Idea
- Build a defect catalogue with a photo, the name and the accept or reject rule for each, and put it at the point of inspection.
- Low effort
- Appraisal
- Problem
- Final inspection depends on what each inspector remembers to check.
- Idea
- List the checks, the method and the accept limits, and sign each completed sheet with the lot number.
- Medium effort
- Prevention
- Problem
- Quality checks are done by the quality department only, so the process drifts between audits.
- Idea
- Have operators, leads and managers each check the key points at a different frequency using a short checklist.
- High effort
- Appraisal
- Problem
- A new gauge or method is trusted without testing how it behaves on a mix of parts and people.
- Idea
- Study the bias, repeatability and reproducibility of the system, and for pass or fail checks use an agreement study.
- Medium effort
- Prevention
- Problem
- The next step trusts the previous one, so a defect goes on until it reaches the end.
- Idea
- Add a quick check of the previous operator's work to each station and agree the route for a part that fails.
People and standards (9)
Ideas for training, the right to stop, alerts and making defects visible to the people who cause and prevent them.
- Low effort
- Prevention
- Problem
- Operators do not see the defects their step makes, because they are found later.
- Idea
- Show each operator the defects from their step, and why each matters to the customer, using real parts.
- Medium effort
- Prevention
- Problem
- An operator sees a defect and keeps going, because stopping needs permission.
- Idea
- Agree the rule that any operator can stop for a defect, give a clear way to call help and respond fast.
- Low effort
- Prevention
- Problem
- A step with a history of defects is run by someone who has not been trained on it.
- Idea
- Mark the quality-critical steps on the skills matrix, and allow only trained people to run them alone.
- Low effort
- Prevention
- Problem
- A defect is found, corrected and forgotten, and returns with the next new starter.
- Idea
- Write a one-page lesson with a photo of the defect and the right way, and use it in training.
- Low effort
- Prevention
- Problem
- Quality data is in a report that nobody on the floor reads.
- Idea
- Post the defect count and the top two types at the board, and ask the team what they think happened.
- Medium effort
- Appraisal
- Problem
- People are assigned to inspection without a check that they can see the defects.
- Idea
- Test each inspector on a set of known parts, record the result and retest at an agreed interval.
- Low effort
- Internal failure
- Problem
- A defect is found on one shift and the next shift makes it again.
- Idea
- Use a one-page alert with a photo, the symptom and the immediate action, and post it at the affected stations.
- Low effort
- Prevention
- Problem
- A person who stops the line or reports a defect is questioned for slowing production.
- Idea
- Make a point of thanking people who report, and track the reports as a good sign, not a failure.
- Low effort
- Prevention
- Problem
- A new starter is put on a job with a high defect risk on day one.
- Idea
- Start new people on the lower-risk steps, pair them with a trained person on the critical ones and sign off when they pass.
Defects and problem solving (9)
Ideas for picking the right problem, finding the cause, containing it and checking the fix.
- Low effort
- Internal failure
- Problem
- A quality project is chosen because it is the latest complaint, not because it is the biggest loss.
- Idea
- Count defects by type and cost over a few weeks, chart them from largest to smallest and take the first one or two.
- Low effort
- Internal failure
- Problem
- A fix addresses the symptom, such as retraining, and the defect returns.
- Idea
- Ask why in a chain, check each answer with data on the floor, and stop at a cause that can be fixed by changing the process.
- Medium effort
- External failure
- Problem
- A customer problem gets a quick fix and a short reply, and appears again.
- Idea
- Use the eight steps for any repeat issue: team, description, containment, cause, corrective action, check, prevention and thanks.
- Low effort
- Internal failure
- Problem
- People guess the cause without describing where the problem does and does not occur.
- Idea
- List where, when, which part and how many, together with what could be affected but is not, and look for the difference.
- Low effort
- External failure
- Problem
- Time is spent finding the cause while suspect parts are still moving to the customer.
- Idea
- Quarantine suspect stock, check what is in transit and at the customer, and set the temporary check that stays until the fix is proven.
- Low effort
- Internal failure
- Problem
- An action is closed when it is done, not when the problem has gone.
- Idea
- Write the check into the action, with a date and a measure, and look again after a few weeks before closing.
- Low effort
- Internal failure
- Problem
- The cause chart is drawn by the quality department alone and misses what the operators know.
- Idea
- Draw the chart on a board with the operators, set up and maintenance, and mark the causes you can check on the floor.
- Low effort
- Prevention
- Problem
- The knowledge from a big problem leaves with the people who solved it.
- Idea
- Write a short note on what happened, what worked and what to do in the next design or launch, and file it where planners will see it.
- Medium effort
- Prevention
- Problem
- The risk analysis is not changed when a defect that it did not predict reaches the customer.
- Idea
- After each escape, check what the FMEA said about it, correct the ranking and add the control that would have caught it.
Customers and the quality system (9)
Ideas for complaints, the cost of poor quality, audits, change control and traceability.
- Low effort
- External failure
- Problem
- Complaints arrive by phone, email and visit, and nobody sees the pattern.
- Idea
- Log each complaint with the part, the date and the reason in one list, and review the list every week.
- Medium effort
- Internal failure
- Problem
- Quality is discussed in counts, so it competes badly with other projects.
- Idea
- Add up scrap, rework, inspection, returns and complaints for a period, show them in the four cost buckets and agree the method with finance.
- Medium effort
- Prevention
- Problem
- Management review is a once-a-year document exercise.
- Idea
- Review the data, the complaints, the audit results and the actions on a regular schedule, and record decisions with owners.
- Medium effort
- Appraisal
- Problem
- Audits check that a document exists, not that the process works.
- Idea
- Plan audits around the processes with the most problems, follow a real job from end to end and record what the auditor saw.
- High effort
- External failure
- Problem
- Nobody knows how fast a lot can be traced to the customer.
- Idea
- Pick a lot, trace forward and back, time the exercise and fix the gaps in the records.
- Medium effort
- Prevention
- Problem
- A change of person, machine, supplier or method goes in without a check, and quality shifts.
- Idea
- List the changes that need a check, check the first output after each change and record the result.
- Low effort
- Appraisal
- Problem
- The quality number is a plant total, so no team sees its own contribution.
- Idea
- Show first pass yield, scrap and returns by area on a board and review it at the huddle.
- Medium effort
- Internal failure
- Problem
- Rework hides the real defect rate, because parts get fixed and counted as good.
- Idea
- Count a part as good only if it passes every step the first time, and chart the result by step.
- Medium effort
- Prevention
- Problem
- A design change reaches the floor by email and some stations keep the old version.
- Idea
- Use a change request with the reason, the affected parts and documents and a sign-off, and check the old version is removed.
How to use this list
- 1
Find your biggest defect first
Count defects by type and cost for a few weeks and chart them. A project that acts on the largest type is worth more than several that act on small ones.
- 2
Prefer prevention to checking
Checking finds defects after they are made. Ideas tagged prevention stop them being made, which is cheaper and lasts longer.
- 3
Write a clear project statement
Say what the problem is, where and how big, what you will change and how you will measure it. A one-page charter keeps the project small enough to finish.
- 4
Prove the fix and standardise it
Check the result after a few weeks, and write the change into the standard work, the control plan and the training, or it will slip back.
Low effort
The team can do it within its own area in a day or two, with little or no spending.
Medium effort
A few weeks, a small budget or help from another department, such as maintenance or engineering.
High effort
A project: capital spending, layout changes or several departments, run with a charter and a plan.
What each cost of quality means
- Prevention
- Spend that stops defects from being made, such as training, planning and mistake-proofing.
- Appraisal
- Spend on checking, testing and measuring to find defects.
- Internal failure
- The cost of defects found inside the plant: scrap, rework and re-inspection.
- External failure
- The cost of defects found by the customer: returns, complaints and recalls.
Templates for quality improvement projects
Free templates for finding the biggest defect, running the project and checking that the fix holds.
- Pareto chart templateA tally sheet, the Pareto by count and by cost with the cumulative line and the 80 percent threshold, and a before and after comparison. Excel sorts and draws it.
- Defect check sheetTally defects by type and day, with units inspected, defect rates, a location sheet and the week's Pareto.
- DMAIC project charter templateThe Define-phase charter on one page: problem and goal, metrics, scope, team and phase dates, with savings and a tollgate checklist.
- Cost of poor quality (COPQ) worksheetCost of quality by prevention, appraisal, internal and external failure, with COPQ as a share of sales.
- 8D report templateD0 to D8 with targets, containment counts, occurrence, escape and systemic causes, verified actions and a worked example.
- CAPA log templateAn Excel CAPA tracker with status, days open, late flags and counts by source, plus a printable log and monthly review.
Running these ideas in LeanSuite
- Quality improvement in manufacturingCapture defects at the station, run root cause analysis and corrective actions in one place and track whether the fixes hold.See Quality improvement in manufacturing
- Corrective action logKeep every complaint and corrective action in one list with an owner, a date and a check that the fix worked.See Corrective action log
- Idea ManagementCollect ideas from frontline teams in one place, review them quickly and turn the best ones into improvement projects.See Idea Management
FAQ
Quality improvement ideas: common questions
Supplier scorecards, mistake-proofing the step that causes most defects, first-piece checks, a gauge study, defect check sheets, the right for operators to stop for a defect, Pareto charts to pick the project, 8D reports for repeat problems and a cost of poor quality report. This page lists 54.
Count defects by type and cost, chart them from largest to smallest and take the first one or two. Then check that the team can influence the cause and that you can measure the result within a few weeks.
The cost of quality is the total spent on preventing defects, checking for them and dealing with the ones that occur, split into prevention, appraisal, internal failure and external failure. The more you spend on prevention, the less usually goes on the failures.
Quality control finds defects in what has been made. Quality improvement changes the process so fewer defects are made. A plant needs both, but only improvement lowers the number of defects over time.
Small projects with a clear cause, such as a check sheet or a mistake-proofing device, can run in days or weeks. Projects that need a gauge study, a capability study or a supplier change take longer. Scope the work so the first result shows within a month or so.
Measure the defect count or the cost before you start, again after the change and again after a few weeks. If the number moved and stayed down, write the change into the standard work and the control plan.
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