CQT study materials
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CQT study plan

CQT · Give each week a clear focus.

8 weeks · About 7 hours per week

Week 1

Quality Concepts and Tools

  • Classify 20 given cost items into prevention, appraisal, internal-failure, and external-failure categories with at least 90% accuracy.

  • Draw the PDCA cycle and attach two concrete manufacturing examples to each phase.

  • Match each of the seven basic quality tools to the data type and question it answers, justifying each match in one sentence.

  • Build a cause-and-effect diagram for a supplied defect scenario and narrow it to three testable root-cause hypotheses.

Your checkpoint

A two-page tool-selection matrix plus a scored set of 20 cost-of-quality classification items (target 18/20).

Week 2

Quality Concepts and Tools & Statistical Techniques

  • Compute mean, median, mode, range, variance, and standard deviation by hand for three supplied datasets and verify with a calculator.

  • Construct a Pareto chart from supplied defect counts and state the vital few in a written sentence.

  • Interpret histogram shape for four distributions and name the process behavior each implies.

  • Calculate z-scores and normal-curve probabilities for 10 problems without software.

  • Explain the difference between common-cause and special-cause variation using two workplace examples.

Your checkpoint

A 25-item problem set on descriptive statistics and the seven tools, scored at 80% or better, with every miss corrected in writing.

Week 3

Statistical Techniques

  • Select the correct control chart (X-bar/R, X-bar/s, p, np, c, u, individuals-moving range) for 12 described scenarios with written rationale.

  • Compute center lines and control limits for an X-bar/R chart from supplied subgroup data and plot the points.

  • Calculate Cp, Cpk, Pp, and Ppk from supplied data and state whether the process is capable against a stated specification.

  • Execute the five steps of a hypothesis test for four scenarios, stating H0, H1, test statistic, decision rule, and conclusion.

  • Distinguish Type I from Type II error and identify which party bears each risk in a supplier-acceptance context.

  • Explain sampling distributions and the central limit theorem in plain language and compute a 95% confidence interval for a mean.

Your checkpoint

A worked computation workbook containing 15 fully solved problems (control limits, capability indices, confidence intervals, hypothesis tests) plus a self-quiz scored at 85% or better.

Week 4

Statistical Techniques & Metrology and Calibration

  • Draw the calibration traceability chain from a working instrument to a national standard and label each link.

  • Build an uncertainty budget with four contributors, separating Type A and Type B components and combining them into expanded uncertainty.

  • Compute and interpret percent gage R&R for a supplied study and state whether the measurement system is acceptable.

  • Separate accuracy, precision, resolution, bias, linearity, and stability using six supplied measurement scenarios.

  • Interpret a regression output (slope, intercept, R-squared, residual pattern) and state the limits of what it proves.

  • Explain the difference between calibration and verification and when each is required.

Your checkpoint

A complete uncertainty budget for one measurement plus a 20-item quiz on metrology and calibration scored at 80% or better.

Week 5

Inspection and Testing

  • Compare receiving, in-process, and final inspection and justify placement for a described production flow.

  • Interpret an operating-characteristic curve and explain producer's risk versus consumer's risk in writing.

  • Distinguish attribute from variable sampling plans and select an appropriate plan for three scenarios.

  • Match six nondestructive test methods to their detectable defect types and select one for each of four described parts.

  • List the elements of a test-method validation and draft them for one physical test.

  • Compute AOQ for a supplied single-sampling plan and state its practical meaning.

Your checkpoint

A one-page inspection plan for a hypothetical product specifying stages, sampling plans, acceptance criteria, and records, plus a 20-item quiz at 80% or better.

Week 6

Quality Systems

  • Map the main ISO 9001 clause groups to the processes of a described organization and identify two gaps.

  • Distinguish corrective from preventive action and write three complete CAPA records with root cause and verification step.

  • Draft a 15-item internal audit checklist tied to specific clauses and state the objective evidence required for each item.

  • Explain document control, record retention, and the structure of a quality manual and contrast them in a short written summary.

  • Describe how management review, internal audit, and CAPA interlock in a closed-loop system.

Your checkpoint

A clause-mapped 15-item audit checklist plus three written CAPA records that pass a self-check against a five-criterion rubric.

Week 7

Quality Concepts and Tools & Statistical Techniques & Inspection and Testing & Metrology and Calibration & Quality Systems

  • Re-test the two weakest domains from prior weeks and raise each score by at least 10 percentage points.

  • Reproduce a one-page formula sheet from memory covering capability, control limits, uncertainty, and sampling.

  • Complete a 60-question timed mixed practice set under exam pacing.

  • Log every missed item by domain and error type (knowledge gap, misread, calculation, guess) and identify the top three recurring causes.

Your checkpoint

A self-authored formula sheet plus an error log of at least 20 entries categorized by domain and error type, with a written remediation action for the top three causes.

Week 8

Quality Concepts and Tools & Statistical Techniques & Inspection and Testing & Metrology and Calibration & Quality Systems

  • Complete two full-length timed practice exams under exam conditions and record per-domain scores.

  • Review every missed item against the error log and confirm each error type has a written countermeasure.

  • Drill the formula sheet and defined-term list until recalled without notes.

  • State a final per-domain readiness rating and a same-day exam strategy for pacing and flagging items.

Your checkpoint

A full-length practice exam scored at 85% or better, with a final one-page readiness summary by domain.

Milestones

Week 2: Score at least 80% on the 25-item descriptive-statistics and seven-tools problem set, with all misses corrected.

Week 4: Pass a 40-question mixed mock on Domains 1 and 2 at 80% or better AND submit a complete four-component uncertainty budget.

Week 6: Demonstrate coverage of Domains 3 and 5 by scoring 80% or better on both domain quizzes and submitting the audit checklist and three CAPA records.

Week 8: Score 85% or better on a full-length timed practice exam with no domain below 75%.