Fish Bone Diagram or Ishikawa diagram (Cause and effect diagram)

Fish Bone Diagram or Ishikawa diagram (Cause and effect diagram) :

Ishikawa diagrams were popularized in the 1960s by Kaoru Ishikawa, who pioneered quality management processes in the Kawasaki shipyards, and in the process became one of the founding fathers of modern management.
The defect is shown as the fish’s head, facing to the right, with the causes extending to the left as fish bones the ribs branch off the backbone for major causes, with sub-branches for root-causes, to as many levels as required.
Analysis of Fish Bone diagram:
  1. Man:
  • Educational Qualification
  • Experience
  • Association with Company
  • Workload
2. Machine:
  • Qualification
  • Preventive Maintenance
  • Breakdown
  • Calibrations
3. Measurement:
  • Inprocess checks
  • Release testing
  • Control sample testing
  • Stability testing
4. Material:

  • Raw material (API& Excipients)
  • Packing materials
  • Semi finished Goods
5. Method:
  • Dispensing
  • Sifting
6. Environment:
Details of Temperature, RH and DP during the process & storage


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