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TQM

TQM

Total Quality Management

1. Overview of TQM: A Management Philosophy That Continuously Improves Process and Product Quality Through Total Participation

    flowchart LR
    A["Fragmented, department-by-<br/>department quality control<br/>reactive defect handling"] --"Quality embedded<br/>across all employees"--> B["Customer-centered<br/>continuous improvement<br/>a culture of total participation"] --"Customer satisfaction<br/>competitive advantage"--> C["Reduced cost of quality<br/>a learning organization culture"]

    style A fill:#FFEBEE,stroke:#D32F2F,color:#000
    style B fill:#E3F2FD,stroke:#1976D2,color:#000
    style C fill:#E8F5E9,stroke:#388E3C,color:#000
  

Definition: A management philosophy developed from the quality thinking of W. Edwards Deming, Joseph Juran, Kaoru Ishikawa, and others, in which customer satisfaction is the ultimate goal, every member of the organization participates in improving the quality of every process, product, and service, and the organization pursues data-driven Continuous Improvement across the enterprise.

Characteristics: (Total involvement) Responsibility for and participation in quality spans from top management to frontline workers. (Process-oriented) Prevents defects proactively by improving the process itself, not just the outcome. (A theoretical foundation for quality) A theoretical foundation for quality management that works complementarily with ISO 9001, Six Sigma, and Lean.


2. Core Structure of TQM

a. The 8 Core Principles of TQM

    flowchart TD
    subgraph R1["​"]
        direction LR
        P1["Customer Focus<br/>Understand & meet<br/>customer needs<br/>customer satisfaction is paramount"]
        P2["Total Involvement<br/>From top management<br/>to the front line —<br/>every employee owns quality"]
        P3["Process Approach<br/>Ensure quality by<br/>improving the process,<br/>not just the outcome"]
        P4["Continuous Improvement<br/>The PDCA cycle —<br/>relentless improvement"]
    end
    subgraph R2["​"]
        direction LR
        P5["Fact-based Decision Making<br/>Based on data<br/>and measurement —<br/>exclude subjective judgment"]
        P6["Systems Approach<br/>Optimize the whole system<br/>of interrelated<br/>processes"]
        P7["Supplier Partnership<br/>Manage supplier quality<br/>build mutually<br/>beneficial relationships"]
        P8["Strategic Leadership<br/>Management drives<br/>the quality vision<br/>and shapes the culture"]
    end

    style P1 fill:#E3F2FD,stroke:#1976D2,color:#000
    style P2 fill:#F3E5F5,stroke:#7B1FA2,color:#000
    style P3 fill:#FFF3E0,stroke:#F57C00,color:#000
    style P4 fill:#E8F5E9,stroke:#388E3C,color:#000
    style P5 fill:#FFEBEE,stroke:#D32F2F,color:#000
    style P6 fill:#E0F2F1,stroke:#00796B,color:#000
    style P7 fill:#E8EAF6,stroke:#3949AB,color:#000
    style P8 fill:#1E3A5F,stroke:#1E3A5F,color:#fff
    style R1 fill:none,stroke:none
    style R2 fill:none,stroke:none
  

Key Contributions by Quality Guru

Quality ThinkerKey ContributionSignature Concept
W. Edwards DemingStatistical process control, 14 management principlesThe PDCA cycle, classifying causes of variation
Joseph JuranThe Quality Trilogy (plan, control, improve)The Juran Trilogy, applying the Pareto principle
Philip CrosbyZero Defects, the cost of quality concept“Quality is Free”
Kaoru IshikawaQC circles, the cause-and-effect diagramThe Ishikawa diagram, the seven basic quality tools

b. TQM Implementation Model and Key Tools

    flowchart LR
    subgraph PDCA["The PDCA Improvement Cycle"]
        direction TD
        PL["Plan<br/>Identify the problem<br/>set goals & plans"]
        DO["Do<br/>Execute a<br/>small-scale pilot"]
        CH["Check<br/>Measure results<br/>analyze data"]
        AC["Act<br/>Standardize & roll out,<br/>or replan"]
        PL --> DO --> CH --> AC --> PL
    end

    subgraph TOOLS["The 7 Basic Quality Tools of TQM"]
        direction TB
        T1["Check sheets, histograms"]
        T2["Pareto charts, cause-and-effect diagrams"]
        T3["Scatter plots, control charts, stratification"]
    end

    PDCA --- TOOLS

    style PDCA fill:#E3F2FD,stroke:#1976D2,color:#1E3A5F
    style TOOLS fill:#E8F5E9,stroke:#388E3C,color:#1B5E20
  

Key TQM Tools and Their Application

ToolPurposeExample SW/IT Application
Check sheetSystematically record defect type/frequencyDaily collection of bug frequency by type
HistogramVisualize data distribution and variationAnalyze response-time distribution, verify SLA compliance
Pareto chartPrioritize key causes (80/20)Focus improvement on the top 20% of defect types
Cause-and-effect diagram (Fishbone)Hierarchical analysis of problem causesExplore root causes of an incident using the 6M framework
Scatter plotIdentify correlation between two variablesAnalyze correlation between code complexity and defect density
Control chartMonitor the statistical stability of a processSet control limits for deployment frequency and defect rate
StratificationAnalyze data broken down by groupCompare defect rates by team, sprint, or module

TQM vs. Six Sigma vs. Lean Comparison

ComparisonTQMSix SigmaLean
PhilosophyEmbed an enterprise-wide quality cultureMinimize defect rate with dataEliminate waste, optimize flow
ApproachIntegrates culture, people, and processThe DMAIC methodology and statisticsValue stream analysis, Kaizen
ScopeEnterprise-wide management innovationProject-level improvementProcess flow improvement
Key toolsThe 7 basic quality tools, PDCADMAIC, statistical analysisVSM, 5S, Kanban
Integrated applicationLean Six Sigma can be implemented by combining Six Sigma methodology and Lean tools on top of the TQM philosophy

3. Expected Benefits and Application of TQM

CategoryExpected BenefitsApplication and Practical Use
Reduced cost of qualitySignificantly lowers defect and rework costs through a prevention-first approachRun QC circles to surface frontline-driven quality improvement initiatives
Improved customer satisfactionHigher requirement-fulfillment rate and NPS build loyal customersSystematize VOC (Voice of Customer) to feed back into product/service improvement
Organizational culture innovationEmbeds a shared sense of quality responsibility and a continuous improvement cultureRun sprint retrospectives as a PDCA structure to integrate Agile with TQM
Linked with ISO 9001TQM principles form the philosophical foundation of the ISO 9001 quality management systemUse the 8 TQM principles as audit criteria when pursuing ISO 9001 certification