The following are reasons of defects in products in a factory. Reason of defects in products Number of occurrences Poor design 13 Lack of testing 14 Lack of danger warnings 10 Poor installation instructions 18 Improper maintenance of the 13 individual components Assembly or construction error 11 Delivery damage 10 Dangerous materials used in manufacturing the product Failure to properly test before sending to market 2 Total 100 What can you conclude based on Pareto Principle?