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Six Sigma Acronyms

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  • IPO
    Input, Process, Output
  • VOC
    Voice of the Customer
  • UCL
    Upper Control Limit
  • MTBF
    Mean Time Between Failures
  • DOE
    Design of Experiments
  • ISO
    International Organization for Standardization
  • TOC
    Theory of Constraints
  • COC
    Cost of Conformance
  • FMEA
    Failure Modes and Effects Analysis
  • MTTR
    Mean Time to Repair
  • SPC
    Statistical Process Control
    Transport, Inventory, Motion, Waiting, Over-processing, Overproduction, Defects (7 Wastes)
  • EWMA
    Exponentially Weighted Moving Average Chart
  • Cpk
    Process Capability Index
  • QFD
    Quality Function Deployment
  • CTQC
    Critical To Quality Characteristic
  • IRR
    Internal Rate of Return
  • DF
    Degrees of Freedom
  • MSA
    Measurement System Analysis
  • CTQ
    Critical To Quality
    Process Failure Modes Effects Analysis
  • TQM
    Total Quality Management
  • LSL
    Lower Specification Limit
    Specific, Measurable, Achievable, Relevant and Time bound
  • 5S
    Sort, Straighten, Shine, Standardize, Sustain
  • USL
    Upper Specification Limit
  • CAR
    Corrective Action Report
  • DFSS
    Design for Six Sigma
  • SWOT
    Strengths, Weaknesses, Opportunities and Threats Analysis
  • VOP
    Voice of the Process
  • DPO
    Defects per Opportunity
    Certified Six Sigma Green Belt
  • CAPA
    Corrective and Preventive Action
  • DPU
    Defects per Unit
  • 5W
    Who, What, When, Where, Why
    Cumulative sum control chart
  • CONC
    Cost of Non-Conformance
  • LTPD
    Lot Tolerance Percent Defective
  • 8D
    Eight Disciplines Problem Solving Process
  • AQL
    Acceptable Quality Level
  • COPQ
    Cost of Poor Quality
  • COQ
    Cost of Quality
    Design Failure Mode and Effect
    Certified Six Sigma Black Belt
    Design For Lean Six Sigma
  • APQP
    Advanced Product Quality Planning
  • SMED
    Single Minute Exchange of Die
  • VA
    Value Added
  • KPIV
    Key Process Input Variables
  • TRIZ
    Theory of Inventive Problem Solving (Russian Term)
  • Cp
    Process Potential Index
  • 5W2H
    Who, What, When, Where, Why, How, How much
  • ROI
    Return on Investment
  • RPN
    Risk Priority Number
  • DPMO
    Defects Per Million Opportunities
  • PDCA
    Plan, Do, Check, Act
    Define, Measure, Analyze, Design, Verify
  • VOB
    Voice of the Business
    Customer, Output, Process, Input, Supplier (Reverse of SIPOC)
    Suppliers, Inputs, Process, Outputs, Customers
  • RCFA
    Root Cause Failure Analysis
  • LIFO
    Last In, First Out
  • Ppk
    Process Capability Index
  • PDPC
    Process Decision Program Charts
    Define, Measure, Analyze, Improve, Control
  • VOE
    Voice of the Employee
  • PPM
    Parts Per Million
  • LCL
    Lower Control Limit
  • KPI
    Key Performance Indicator
    Analysis of Variance
  • LSS
    Lean Six Sigma
  • RTY
    Rolled Throughput Yield
  • Pp
    Process Performance Measure
  • KPOV
    Key Process Output Variable