PARETO DIAGRAM - Assignment Example

Pareto Diagrams Pareto Diagram before Improvement Item Frequency Cumulative frequency Percent of total Cumulative percentage Scratches 90 90 42.1 42.1 Chips 76 166 35.5 77.6 Cracks 25 191 11.7 89.3 Uneven Surface 9 200 4.2 93.5 other 8 208 3.7 97.2 Rough Surface 6 214 2.8 100 Total 214 100 Pareto Diagram after Improvement; If the management opts to reduce the amount of paint defects, by reducing the major defect by 30%, then the amount of scratches ought to reduce by 27. This makes scratches rank second in the list as shown in the table below.

It’s worth noting that, this would be an effective solution as it reduces the overall defect by approximately 13%, which would not have been attained by improving any other factor by the same percentage. As a matter of fact, the use of pareto diagram in determining where to start is based on the rule that it is easier to reduce larger problems by a greater percentage than reducing the smaller problems to zero. By this principle, the large problems are given first priority with the smaller ones left out to be swabbed later.

Item Frequency Cumulative frequency Percent of total Cumulative percentage Chips 76 76 40.6 40.6 Scratches 63 139 33.7 74.3 Cracks 25 164 13.4 87.7 Uneven Surface 9 173 4.8 92.5 other 8 181 4.3 96.8 Rough Surface 6 187 3.2 100 187 100 2. Exercise two Item Frequency Cumulative frequency Percent of total Cumulative percentage Wrong dose 100 100 52.1 52.1 Wrong time 70 170 36.4 88.5 Wrong medicine 15 185 7.8 96.3 Wrong dc’d 4 189 2.1 98.4 Missed dose 3 192 1.6 100 Total 192 100 3.

Exercise three Category Frequency Cumulative frequency Percent of total Cumulative % Orange peel” texture in color coat 32 32 32 32 Ripples in color coat 28 60 28 60 Uneven color thickness 19 79 19 79 Poor adherence of color to primer 5 84 5 84 Uneven gloss thickness 5 89 5 89 Electro coat uneven—redone 4 93 4 93 Ripples in gloss coat 4 97 4 97 Lack of clarity in color 2 99 2 99 “Orange peel” texture in gloss coat 1 100 1 100 100 100 Based on the collected data, from the quality study, a high frequency of unstardard painting results from orange peel in colour coat.

Therefore, in an effort to reduce customer disatisfaction, checking on color cating process first would reduce the damage by a higher percentage. Moreover, as noted in the pareto diagram, the break point in the cumulative percent graph is realised after the first three bars; that is orange peels, ripples and uneven colour thickness, all which are defaultsin the coatring stage. this implies that, if the management focuses more on improving the coating stage, then the problem would be thoughly reduced.

References Taghizadegan, S. (2013). Mastering Lean Six Sigma: Advanced black belt concepts. New York, N.Y.] (222 East 46th Street, New York, NY 10017: Momentum Press.