1. Defects were charted from an alternator production line (see the Production Defect Check Sheet below). Whenever a defect was discovered, the operator would make an entry in the appropriate column with merely a single line for each occurrence. Now you are asked to create a Pareto Chart to tell what problems seemed to be the biggest headache that requires the primary. focus. You will first need to total the number of occurrences (N) then divide each individual defect by (N) to determine the percentage of defects.

Defect/Problem Category No. of Occurrences % of Total Accum. % 92 35.11% 35.11% 68 25.95% 61.07% 30 11.45% 72.52% 22 8.40% 80.92% 18 6.87% 87.79% 15 5.73% 93.51% 10 3.82% 97.33% 7 2.67% 100.00% Total Defects 262 100.00% Pareto Chart 100 100.00% 80 80.00% 60 60.00% Defect Categories No of Occurence 40 40.00% Accum Percentage 20 20.00% 0 0.00% A B C D E F G H Defect Categories(defect tracking sheet) No PRODUCTION DEFECT CHECK SHEET Product Line 3G Line Date 12 / 09 / 02 Product Type 3G Alternators Factory Church Street No. of Inspections 280 Data Collector 1. M. Quality Total Number_ Group Name Day Shift Lot Number Remarks: TYPE OCCURRENCE SUBTOTAL HIGH TURN ON SPEED 18 HIGH RIPPLE CURRENT 38 HIGH LEAKAGE 12 LOW OUTPUT AT LOW SPEED 15 LOW OUTPUT AT HIGH SPEED 7 DEAD UNIT 4 BAD REGULATOR 22 BAD VOLTAGE SETPOINT 6