{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Six Sigma Structure",
  "description": "JSON structure documentation for Six Sigma methodology concepts, project artifacts, and quality metrics",
  "version": "1.0",
  "resources": {
    "Project": {
      "description": "A Six Sigma improvement project following DMAIC or DMADV methodology",
      "fields": {
        "id": { "type": "string", "description": "Unique project identifier" },
        "name": { "type": "string", "description": "Project name" },
        "methodology": { "type": "string", "enum": ["DMAIC", "DMADV", "DFSS", "LEAN", "LEAN_SIX_SIGMA"] },
        "phase": { "type": "string", "enum": ["Define", "Measure", "Analyze", "Improve", "Control"] },
        "champion": { "type": "string", "description": "Executive sponsor" },
        "blackBelt": { "type": "string", "description": "Project leader (Black Belt)" },
        "metrics": { "type": "object", "items": "ProjectMetrics" }
      }
    },
    "ProjectMetrics": {
      "description": "Statistical performance metrics for a Six Sigma project",
      "fields": {
        "baselineSigmaLevel": { "type": "number", "description": "Process sigma level before improvement" },
        "targetSigmaLevel": { "type": "number", "description": "Target sigma level" },
        "baselineDPMO": { "type": "number", "description": "Baseline defects per million opportunities" },
        "targetDPMO": { "type": "number", "description": "Target DPMO" },
        "capabilityIndex": { "type": "number", "description": "Process capability Cpk value" },
        "estimatedAnnualSavings": { "type": "number", "description": "Projected annual cost savings" }
      }
    },
    "DefectMeasurement": {
      "description": "A defect measurement record for a process step",
      "fields": {
        "processStep": { "type": "string", "description": "The process step being measured" },
        "defectsObserved": { "type": "integer", "description": "Number of defects observed" },
        "opportunities": { "type": "integer", "description": "Number of opportunities for defects" },
        "units": { "type": "integer", "description": "Number of units inspected" },
        "DPMO": { "type": "number", "description": "Calculated defects per million opportunities" },
        "sigmaLevel": { "type": "number", "description": "Calculated sigma level" },
        "measurementDate": { "type": "string", "format": "date-time" }
      }
    },
    "ControlChart": {
      "description": "Statistical process control chart data",
      "fields": {
        "chartType": { "type": "string", "enum": ["X-bar", "R", "S", "I-MR", "P", "NP", "C", "U"], "description": "Type of control chart" },
        "processName": { "type": "string", "description": "Name of the process being charted" },
        "centerLine": { "type": "number", "description": "Control chart center line (mean)" },
        "upperControlLimit": { "type": "number", "description": "Upper control limit (UCL)" },
        "lowerControlLimit": { "type": "number", "description": "Lower control limit (LCL)" },
        "dataPoints": { "type": "array", "description": "Time-series data points plotted on the chart" },
        "outOfControlPoints": { "type": "array", "description": "Points violating control rules" }
      }
    },
    "FishboneDiagram": {
      "description": "Ishikawa (fishbone / cause-and-effect) diagram structure",
      "fields": {
        "effect": { "type": "string", "description": "The problem/effect being analyzed" },
        "categories": {
          "type": "array",
          "description": "Cause categories (6M: Machine, Method, Material, Man, Measurement, Mother Nature)",
          "items": {
            "type": "object",
            "properties": {
              "category": { "type": "string" },
              "causes": { "type": "array", "items": "string" }
            }
          }
        }
      }
    }
  },
  "methodology": {
    "DMAIC": {
      "description": "Define-Measure-Analyze-Improve-Control: Used for improving existing processes",
      "phases": {
        "Define": {
          "purpose": "Define the problem, customer requirements, and project goals",
          "keyTools": ["Project Charter", "SIPOC", "Voice of Customer (VOC)", "Critical-to-Quality (CTQ) Tree"]
        },
        "Measure": {
          "purpose": "Measure current process performance and establish baseline",
          "keyTools": ["Process Map", "Data Collection Plan", "Measurement System Analysis (MSA)", "Baseline Sigma Calculation"]
        },
        "Analyze": {
          "purpose": "Identify root causes of defects and process variation",
          "keyTools": ["Fishbone Diagram", "5 Whys", "Pareto Analysis", "Regression Analysis", "Hypothesis Testing"]
        },
        "Improve": {
          "purpose": "Develop and implement solutions to eliminate root causes",
          "keyTools": ["Design of Experiments (DOE)", "FMEA", "Pilot Testing", "Solution Selection Matrix"]
        },
        "Control": {
          "purpose": "Sustain improvements and prevent regression",
          "keyTools": ["Control Charts", "Control Plan", "Standard Operating Procedures", "Process Audits"]
        }
      }
    },
    "DMADV": {
      "description": "Define-Measure-Analyze-Design-Verify: Used for designing new processes or products",
      "phases": ["Define", "Measure", "Analyze", "Design", "Verify"]
    }
  }
}